CN110168051B

CN110168051B - Liquid crystalline composition, polymeric liquid crystal compound, light absorption anisotropic film, laminate, and image display device

Info

Publication number: CN110168051B
Application number: CN201780080977.0A
Authority: CN
Inventors: 松山拓史; 星野渉; 新居辉树; 西村直弥
Original assignee: Fujifilm Corp
Current assignee: Fujifilm Corp
Priority date: 2016-12-28
Filing date: 2017-12-27
Publication date: 2022-11-22
Anticipated expiration: 2037-12-27
Also published as: CN110168051A; US11505744B2; JP2021051313A; KR102267828B1; US20190322937A1; KR20190085991A; KR102313192B1; WO2018124198A1; KR20210076193A; JPWO2018124198A1; CN115651667A; JP7125463B2; JP6797937B2

Abstract

The invention provides a polymer liquid crystal compound capable of forming a light absorption anisotropic film with high degree of orientation, a liquid crystal composition, a light absorption anisotropic film using the liquid crystal composition, a laminated body and an image display device. The liquid crystalline composition of the present invention comprises a polymeric liquid crystalline compound comprising a repeating unit represented by formula (1) and a dichroic material, wherein in formula (1), the difference between the logP value of P1, L1 and SP1 and the logP value of M1 is 4 or more. Formula (1)) Wherein P1 represents a main chain of a repeating unit, L1 represents a single bond or a 2-valent linking group, SP1 represents a spacer group, M1 represents a mesogenic group, and T1 represents a terminal group.

Description

Liquid crystalline composition, polymeric liquid crystal compound, light-absorbing anisotropic film, laminate, and image display device

Technical Field

The present invention relates to a liquid crystal composition, a polymer liquid crystal compound, a light absorption anisotropic film, a laminate, and an image display device.

Background

Conventionally, when it is necessary to include an attenuation function, a polarization function, a scattering function, a light shielding function, and the like of irradiation light of laser light or natural light, devices that operate based on different principles according to their respective functions have been used. Therefore, products corresponding to the above functions are also manufactured in manufacturing processes different for each function.

For example, in a Liquid Crystal Display (LCD), a linear polarizer and a circular polarizer are used to control optical rotation and birefringence in display. In an Organic Light Emitting Diode (OLED), a circular polarizing plate is used to prevent reflection of external Light.

In the past, iodine has been widely used as a dichroic material in these polarizing plates (polarizing elements), but a polarizing element using an organic color as a dichroic material instead of iodine has also been studied.

For example, patent document 1 describes "a light-absorbing anisotropic film comprising at least one thermotropic liquid crystalline dichroic dye and at least one thermotropic liquid crystalline polymer, wherein the thermotropic liquid crystalline dichroic dye has a mass content of 30% or more in the light-absorbing anisotropic film. "([ claim 1 ]).

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-237513

Disclosure of Invention

Technical problem to be solved by the invention

As a result of conducting studies on the light absorption anisotropic film described in patent document 1, the present inventors have found that depending on the kind of thermotropic liquid crystalline polymer used for forming the light absorption anisotropic film, the degree of orientation of the light absorption anisotropic film may become insufficient as the degree of orientation of the dichroic material decreases, and there is room for improvement.

Accordingly, an object of the present invention is to provide a polymer liquid crystal compound capable of forming a light absorption anisotropic film having a high degree of alignment, a liquid crystalline composition, a light absorption anisotropic film using the liquid crystalline composition, a laminate, and an image display device.

Means for solving the technical problem

As a result of intensive studies to achieve the above object, the present inventors have found that a light-absorbing anisotropic film having a high degree of orientation can be formed by using a polymer liquid crystal compound having a repeating unit in which the difference between the logP value of the main chain to the spacer group and the logP value of the mesogenic group is 4 or more as a polymer liquid crystal compound blended with a dichroic substance, and have completed the present invention.

That is, the present inventors have found that the above problems can be solved by the following configuration.

[1]

A liquid crystalline composition comprising a polymeric liquid crystalline compound containing a repeating unit represented by the following formula (1) and a dichroic material,

in the following formula (1), the difference between the logP value of P1, L1 and SP1 and the logP value of M1 is 4 or more.

In the following formula (1), P1 represents a main chain of a repeating unit, L1 represents a single bond or a 2-valent linking group, SP1 represents a spacer group, M1 represents a mesogenic group, and T1 represents a terminal group.

[2]

The liquid crystalline composition according to [1], wherein,

SP1 in the following formula (1) contains at least one structure selected from the group consisting of an oxyethylene structure, an oxypropylene structure, a polysiloxane structure and a fluorinated alkylene structure.

[3]

The liquid crystalline composition according to [1] or [2], wherein,

the polymeric liquid crystal compound further contains a repeating unit represented by the following formula (2),

in the following formula (2), the difference between the logP values of P2, L2 and SP2 and the logP value of M2 is less than 4.

In the following formula (2), P2 represents a main chain of a repeating unit, L2 represents a single bond or a 2-valent linking group, SP2 represents a spacer group, M2 represents a mesogenic group, and T2 represents a terminal group.

[4]

The liquid crystalline composition according to any one of [1] to [3], wherein,

the polymeric liquid crystal compound further contains a repeating unit represented by the following formula (3).

In formula (3) below, P3 represents a main chain of a repeating unit, L3 represents a single bond or a 2-valent linking group, SP3 represents a spacer group, and T3 represents a terminal group.

[5]

The liquid crystalline composition according to any one of [1] to [4], wherein,

the polymeric liquid crystal compound contains two or more kinds of repeating units represented by the following formula (1).

[6]

The liquid crystalline composition according to any one of [1] to [5], wherein,

the weight average molecular weight of the polymeric liquid crystal compound is 10000 or more.

[7]

The liquid crystalline composition according to any one of [1] to [5], wherein,

the weight average molecular weight of the macromolecular liquid crystal compound is less than 10000.

[8]

The liquid crystalline composition according to any one of [1] to [7], wherein,

the polymer liquid crystal compound is a star polymer represented by the following formula (4).

In the following formula (4), n _A Represents an integer of 3 or more, each of the plurality of PIs independently represents a polymer chain containing any one of the repeating units represented by the above formulae (1) to (3), and a represents an atomic group which becomes a core of the star polymer; wherein at least one of the plurality of PIs represents a polymer chain including a repeating unit represented by formula (1) described later.

[9]

A polymeric liquid crystal compound comprising a repeating unit represented by the following formula (1),

in the following formula (1), the difference between the logP values of P1, L1 and SP1 and the logP value of M1 is 4 or more.

[10]

The polymeric liquid crystalline substance according to [9], wherein,

[11]

The polymeric liquid crystalline substance according to [9] or [10], wherein,

the polymeric liquid crystal compound further comprises a repeating unit represented by the following formula (2),

[12]

The polymeric liquid crystalline substance according to any one of [9] to [11], wherein,

[13]

The polymeric liquid crystalline substance according to any one of [9] to [12], wherein,

[14]

The polymeric liquid crystalline substance according to any one of [9] to [13], wherein,

[15]

[16]

The polymeric liquid crystalline substance according to any one of [9] to [15], wherein,

[17]

A light absorption anisotropic film formed using the liquid crystalline composition according to any one of [1] to [8 ].

[18]

A laminate comprising a substrate and the light absorption anisotropic film according to [17] provided on the substrate.

[19]

The laminate according to [18], further comprising a λ/4 plate provided on the light absorption anisotropic film.

[20]

An image display device comprising the light absorption anisotropic film according to [17] or the laminate according to [18] or [19 ].

Effects of the invention

According to the present invention, it is possible to provide a polymer liquid crystal compound capable of forming a light absorption anisotropic film having a high degree of alignment, a liquid crystalline composition, a light absorption anisotropic film using the liquid crystalline composition, a laminate, and an image display device.

Detailed Description

The present invention will be described in detail below.

The following description of the constituent elements may be made in accordance with a representative embodiment of the present invention, but the present invention is not limited to such an embodiment.

In the present specification, the numerical range represented by the term "to" means a range in which the numerical values before and after the term "to" are included as the lower limit value and the upper limit value.

In the present specification, a (meth) acrylic acid is a general term for "acrylic acid" and "methacrylic acid", and a (meth) acryloyl group is a general term for "acryloyl group" and "methacryloyl group".

[ liquid Crystal composition ]

The liquid crystalline composition of the present invention contains a polymeric liquid crystalline compound containing a repeating unit represented by the following formula (1) and a dichroic substance, and in the following formula (1), the difference between the logP value of P1 (hereinafter, also referred to as "main chain"), L1, and SP1 (hereinafter, also referred to as "spacer group") and the logP value of M1 (hereinafter, also referred to as "mesogenic group") is 4 or more.

According to the liquid crystalline composition of the present invention, a light absorption anisotropic film having a high degree of alignment can be formed. The reason for this is not clear, but is estimated roughly as follows.

The logP value is an index of the properties of hydrophilicity and hydrophobicity of a chemical structure. In the repeating unit represented by the following formula (1), since the difference between the logP value of the main chain, L1 and spacer group and the logP value of the mesogenic group is a predetermined value or more, the compatibility between the structure from the main chain to the spacer group and the mesogenic group is low. This increases the crystallinity of the polymeric liquid crystal compound, and it is estimated that the degree of alignment of the polymeric liquid crystal compound is high. As described above, it is presumed that when the degree of alignment of the polymer liquid crystal compound is high, the compatibility of the polymer liquid crystal compound with the dichroic material is lowered (that is, the crystallinity of the dichroic material is improved), and the degree of alignment of the dichroic material is improved. As a result, it is considered that the degree of orientation of the obtained light absorption anisotropic film is high.

[ Polymer liquid Crystal Compound ]

< repeating Unit (1) >, and

the polymeric liquid crystal compound of the present invention contains a repeating unit represented by the following formula (1) (also referred to as "repeating unit (1)" in the present specification). In the repeating unit (1), the difference between the logP value of P1, L1 and SP1 and the logP value of M1 is 4 or more.

[ chemical formula 1]

In the formula (1), P1 represents a main chain of a repeating unit, L1 represents a single bond or a 2-valent linking group, SP1 represents a spacer group, M1 represents a mesogenic group, and T1 represents a terminal group.

Specific examples of the main chain of the repeating unit represented by P1 include groups represented by the following formulae (P1-a) to (P1-D), and among these, a group represented by the following formula (P1-a) is preferable from the viewpoint of the diversity of monomers to be used as raw materials and ease of handling.

[ chemical formula 2]

In the formulae (P1-a) to (P1-D), "' indicates a bonding position to L1 in the formula (1). Formula (A), (B)In P1-A), R ¹ Represents a hydrogen atom or a methyl group. In the formula (P1-D), R ² Represents an alkyl group.

The group represented by the formula (P1-A) is preferably a unit of a partial structure of poly (meth) acrylate obtained by polymerization of (meth) acrylate.

The group represented by the formula (P1-B) is preferably an ethylene glycol unit in polyethylene glycol obtained by polymerizing ethylene glycol.

The group represented by the formula (P1-C) is preferably a propylene glycol unit obtained by polymerizing propylene glycol.

The group represented by the formula (P1-D) is a siloxane unit of polysiloxane obtained by condensation polymerization of silanol. Wherein the silanol is represented by the formula Si (R) ² ) ₃ (OH) or a salt thereof. In the formula, a plurality of R ² Each independently represents a hydrogen atom or an alkyl group. Wherein a plurality of R ² At least one of them represents an alkyl group.

L1 is a single bond or a 2-valent linking group.

As the 2-valent linking group represented by L1, examples thereof include-C (O) O-, -OC (O) -, and-O-, -S-, -C (O) NR ³ -、-NR ³ C(O)-、-S(O) ₂ -and-NR ³ R ⁴ -and the like. In the formula, R ³ And R ⁴ Each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms which may have a substituent. In the specific example of the 2-valent linking group, the left bonding bond is bonded to P1, and the right bonding bond is bonded to SP 1.

When P1 is a group represented by the formula (P1-A), L1 is preferably a group represented by-C (O) O-.

When P1 is a group represented by the formulae (P1-B) to (P1-D), L1 is preferably a single bond.

The spacer group represented by SP1 preferably includes at least one structure selected from the group consisting of an oxyethylene structure, an oxypropylene structure, a polysiloxane structure, and a fluorinated alkylene structure, for the reason that liquid crystallinity, availability of raw materials, and the like are easily exhibited.

Among them, the oxyethylene structure represented by SP1 is preferably represented by — (CH) ₂ -CH ₂ O) _n1 Denotes a group of (2).In the formula, n1 represents an integer of 1 to 20, and represents a bonding position with L1 or M1. From the viewpoint of further improving the effect of the present invention, n1 is preferably an integer of 2 to 10, more preferably an integer of 2 to 4, and most preferably 3.

The oxypropylene structure represented by SP1 is preferably represented by — (CH) ₃ )-CH ₂ O) _n2 A group represented by. In the formula, n2 represents an integer of 1 to 3, and represents a bonding position with L1 or M1.

The polysiloxane structure represented by SP1 is preferably represented by — (Si (CH) ₃ ) ₂ -O) _n3 Denotes a group of (1). In the formula, n3 represents an integer of 6 to 10, and represents a bonding position with L1 or M1.

The fluorinated alkylene structure represented by SP1 is preferably — (CF) ₂ -CF ₂ ) _n4 A group represented by. In the formula, n4 represents an integer of 6 to 10, and represents a bonding position with L1 or M1.

The mesogenic group represented by M1 is a group representing a main skeleton of a liquid crystal molecule contributing to the formation of liquid crystal. The liquid crystal molecules exhibit liquid crystallinity in a state (mesophase) intermediate between the crystalline state and the isotropic liquid state. The mesogenic group is not particularly limited, and for example, "Flussie Kristalle in Ta Bellen II" (VEB Deutsche Verlag fur Grundstoff Industrial, leipzig, journal of 1984), especially the descriptions on pages 7 to 16, the editorial Committee of liquid Crystal overview, and the liquid Crystal overview (Bolus, journal of 2000), especially the description in Chapter 3, can be referred to.

The mesogenic group is preferably a group having at least one cyclic structure selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group, and an alicyclic group, for example.

From the viewpoint of further improving the effect of the present invention, the mesogenic group preferably has an aromatic hydrocarbon group, more preferably 2 to 4 aromatic hydrocarbon groups, and further preferably 3 aromatic hydrocarbon groups.

The mesogenic group is preferably a group represented by the following formula (M1-a) or the following formula (M1-B), and more preferably a group represented by the formula (M1-B), from the viewpoints of the development of liquid crystallinity, the adjustment of liquid crystal phase transition temperature, availability of raw materials, and suitability for synthesis, and from the viewpoint of further excellent effects of the present invention.

[ chemical formula 3]

In the formula (M1-A), A1 is a 2-valent group selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group and an alicyclic group. These groups may be substituted with a substituent such as an alkyl group, a fluorinated alkyl group or an alkoxy group.

The 2-valent group represented by A1 is preferably a 4-to 6-membered ring. The 2-valent group represented by A1 may be a single ring or a condensed ring.

* Indicates the bonding position to SP1 or T1.

Examples of the 2-valent aromatic hydrocarbon group represented by A1 include a phenylene group, a naphthylene group, a fluorene-diyl group, an anthracene-diyl group, and a tetracene-diyl group, and from the viewpoint of the variety of the design of the mesogenic skeleton, the availability of the raw material, and the like, a phenylene group or a naphthylene group is preferable, and a phenylene group is more preferable.

The 2-valent heterocyclic group represented by A1 may be either aromatic or non-aromatic, but is preferably a 2-valent aromatic heterocyclic group in view of further improving the degree of orientation.

Examples of the atom other than the carbon atoms constituting the 2-valent aromatic heterocyclic group include a nitrogen atom, a sulfur atom and an oxygen atom. When the aromatic heterocyclic group has a plurality of ring-forming atoms other than carbon, these may be the same or different.

Specific examples of the 2-valent aromatic heterocyclic group include pyridylene (pyridine-diyl), pyridazine-diyl, imidazole-diyl, thienylene (thiophene-diyl), quinolylene (quinoline-diyl), isoquinolylene (isoquinoline-diyl), oxazole-diyl, thiazole-diyl, oxadiazole-diyl, benzothiazole-diyl, benzothiadiazole-diyl, phthalimide-diyl, thienothiazole-diyl, thiazolothiazole-diyl, thienothiophene-diyl, and thienooxazole-diyl.

Specific examples of the 2-valent alicyclic group represented by A1 include cyclopentylene and cyclohexylene.

In the formula (M1-A), a1 represents an integer of 1 to 10. When A1 is 2 or more, a plurality of A1 may be the same or different.

In the formula (M1-B), A2 and A3 are each independently A2-valent group selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group and an alicyclic group. Specific examples and preferred embodiments of A2 and A3 are the same as those of A1 in the formula (M1-a), and therefore, descriptions thereof are omitted.

In the formula (M1-B), A2 represents an integer of 1 to 10, and when A2 is 2 or more, a plurality of A2 may be the same or different, a plurality of A3 may be the same or different, and a plurality of LA1 may be the same or different. From the reason that the effect of the present invention is further excellent, a2 is preferably an integer of 2 or more, more preferably 2.

In the formula (M1-B), when a2 is 1, LA1 is a 2-valent linking group. When a2 is 2 or more, a plurality of LA1 s are each independently a single bond or a 2-valent linking group, and at least one of a plurality of LA1 s is a 2-valent linking group. When a2 is 2, it is preferable that one of the two groups la1 is a 2-valent linking group and the other is a single bond, because the effect of the present invention is further excellent.

In the formula (M1-B), examples of the 2-valent linking group represented by LA1 include-O-, - (CH) ₂ ) _g -、-(CF ₂ ) _g -、-Si(CH ₃ ) ₂ -、-(Si(CH ₃ ) ₂ O) _g -、-(OSi(CH ₃ ) ₂ ) _g - (g represents an integer of 1 to 10), -N (Z) -, -C (Z) = C (Z') -, -C (Z) = N-, -N = C (Z) -, -C (Z) ₂ -C(Z’) ₂ <xnotran> -, -C (O) -, -OC (O) -, -C (O) O-, -O-C (O) O-, -N (Z) C (O) -, -C (O) N (Z) -, -C (Z) = C (Z ') -C (O) O-, -O-C (O) -C (Z) = C (Z') -, -C (Z) = N-, -N = C (Z) -, -C (Z) = C (Z ') -C (O) N (Z ") -, -N (Z") -C (O) -C (Z) = C (Z') -, -C (Z) = C (Z ') -C (O) -S-, -S-C (O) -C (Z) = C (Z') -, -C (Z) = N-N = C (Z ') - (Z, Z', Z " , 1 ～ 4 , , , .), -C ≡ C-, -N = N-, -S-, -S (O) -, -S (O) (O) -, </xnotran> - (O) S (O) O-, -O (O) S (O) O-),-SC (O) -, and-C (O) S-, etc. Among these, the preferable one is-C (O) O-from the viewpoint of further improving the effect of the present invention. LA1 may be a group obtained by combining two or more of these groups.

Specific examples of M1 include the following structures. In the following specific examples, "Ac" represents an acetyl group.

[ chemical formula 4]

[ chemical formula 5]

Examples of the terminal group represented by T1 include a hydrogen atom, a halogen atom, a cyano group, a nitro group, a hydroxyl group, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkylthio group having 1 to 10 carbon atoms, an alkoxycarbonyloxy group having 1 to 10 carbon atoms, an alkoxycarbonyl group having 1 to 10 carbon atoms (ROC (O) -: R represents an alkyl group), an acyloxy group having 1 to 10 carbon atoms, an acylamino group having 1 to 10 carbon atoms, an alkoxycarbonyl group having 1 to 10 carbon atoms, an alkoxycarbonylamino group having 1 to 10 carbon atoms, a sulfonylamino group having 1 to 10 carbon atoms, a sulfamoyl group having 1 to 10 carbon atoms, a carbamoyl group having 1 to 10 carbon atoms, a sulfinyl group having 1 to 10 carbon atoms, a ureido group having 1 to 10 carbon atoms, a (meth) acryloyloxy group, and the like. Examples of the (meth) acryloyloxy group include a group represented by the formula-L-A (L represents a single bond or a linking group, and specific examples of the linking group are the same as those of the above-mentioned L1 and SP1, and A represents a (meth) acryloyloxy group).

From the viewpoint of further improving the effect of the present invention, T1 is preferably an alkoxy group having 1 to 10 carbon atoms, more preferably an alkoxy group having 1 to 5 carbon atoms, and still more preferably a methoxy group. These terminal groups may be substituted with these groups or with a polymerizable group as described in Japanese patent application laid-open No. 2010-244038.

From the viewpoint of further improving the effect of the present invention, the number of atoms in the main chain of T1 is preferably 1 to 20, more preferably 1 to 15, still more preferably 1 to 10, and particularly preferably 1 to 7. The number of atoms of the main chain of T1 is 20 or less, and thus the degree of orientation of the light absorption anisotropic film is further improved. The "main chain" in T1 means the longest molecular chain bonded to M1, and the number of hydrogen atoms is not counted in the main chain of T1. For example, when T1 is n-butyl, the number of atoms in the main chain is 4, and when T1 is sec-butyl, the number of atoms in the main chain is 3.

From the viewpoint of further improving the effect of the present invention, the content of the repeating unit (1) is preferably 20 to 100% by mass, more preferably 30 to 99.9% by mass, and even more preferably 40 to 99.0% by mass, based on 100% by mass of the total repeating units of the polymer liquid crystal compound.

In the present invention, the content of each repeating unit contained in the polymeric liquid crystal compound is calculated from the amount (mass) of each monomer used to obtain each repeating unit.

The repeating unit (1) may be contained in the polymeric liquid crystal compound alone or in combination of two or more. When the polymeric liquid crystal compound contains two or more kinds of repeating units (1), there are advantages in that the solubility of the polymeric liquid crystal compound in a solvent is improved and the adjustment of the liquid crystal phase transition temperature is easy. When two or more kinds of the repeating units (1) are contained, the total amount thereof is preferably within the above range.

When two or more kinds of the repeating units (1) are contained, the repeating unit (1) containing no polymerizable group in T1 and the repeating unit (1) containing a polymerizable group in T1 may be used simultaneously. This further improves the curability of the light absorption anisotropic film.

In this case, the ratio of the polymerizable group-containing repeating unit (1) in T1 to the polymerizable group-free repeating unit (1) in T1 (polymerizable group-containing repeating unit (1) in T1)/polymerizable group-free repeating unit (1) in T1) in the polymeric liquid crystal compound is preferably 0.005 to 4, more preferably 0.01 to 2.4 in terms of a mass ratio. When the mass ratio is 4 or less, there is an advantage that the degree of orientation is excellent. When the mass ratio is 0.05 or more, the curability of the light absorption anisotropic film is further improved.

(logP value)

In the formula (1), the logP values of P1, L1 and SP1 (hereinafter, also referred to as "logP") ₁ ". ) logP value to M1 (hereinafter, also referred to as "logP") ₂ ". ) Difference (| logP) ₁ -logP ₂ |) is 4 or more, and is preferably 4.25 or more, and more preferably 4.5 or more, from the viewpoint of further improving the degree of orientation of the light absorption anisotropic film.

From the viewpoint of adjustment of the liquid crystal phase transition temperature and synthesis suitability, the upper limit of the difference is preferably 15 or less, more preferably 12 or less, and still more preferably 10 or less.

Among them, the logP value is an index showing the properties of hydrophilicity and hydrophobicity of a chemical structure, and is sometimes referred to as a hydrophilicity-hydrophobicity parameter. The logP value can be calculated using software such as ChemBioDraw Ultra or HSPiP (Ver.4.1.07). Furthermore, it can also be experimentally determined by the method of OECD Guidelines for the Testing of chemical, section 1, test No.117 (test No.117, section 1, by the chemical Guidelines for Testing of tissue products). As long as the present invention is not particularly limited, a value calculated by inputting the structural formula of the compound to HSPiP (ver.4.1.07) is adopted as the logP value.

As described above, the logP ₁ Means logP values for P1, L1 and SP 1. The "logP values of P1, L1, and SP 1" are logP values having a structure in which P1, L1, and SP1 are integrated, and are not values obtained by summing up the logP values of P1, L1, and SP 1. In particular logP ₁ The calculation is performed by inputting a series of structural formulae from P1 to SP1 in formula (1) to the software.

However, in calculating logP ₁ In the case of the moiety represented by P1 in the series of structural formulae P1 to SP1, the moiety represented by P1 may be the structure of the moiety itself (for example, the above-mentioned formulae (P1-a) to (P1-D), etc.), or may be the structure of the moiety which becomes P1 after polymerization of the monomer used for obtaining the repeating unit represented by formula (1).

Among them, specific examples of the latter (group which may be P1) are as follows. When P1 is obtainable by polymerization of (meth) acrylates, is CH ₂ ＝C(R ¹ ) A group represented by (R) ¹ Represents a hydrogen atom or a methyl group. ). And ethylene glycol when P1 is obtainable by polymerization of ethylene glycol and propylene glycol when P1 is obtainable by polymerization of propylene glycol. And, when P1 is obtainable by polycondensation of silanol, is silanol (represented by the formula Si (R) ² ) ₃ (OH) or a salt thereof. Plural R ² Each independently represents a hydrogen atom or an alkyl group. Wherein a plurality of R ² At least one of (a) represents an alkyl group. )

If it is in contact with the logP ₂ If the difference is greater than 4, logP is obtained ₁ Can be compared with logP ₂ Low, and may be higher than logP ₂ High.

Among them, the logP value of the usual mesogenic group (the aforementioned logP) ₂ ) Tends to fall within the range of 4 to 6. At this time, when logP ₁ Ratio log P ₂ Low time, logP ₁ The value of (b) is preferably 1 or less, more preferably 0 or less. On the other hand, when logP ₁ Ratio log P ₂ High time, logP ₁ The value of (b) is preferably 8 or more, more preferably 9 or more.

When P1 in the above formula (1) can be obtained by polymerization of a (meth) acrylic ester, and logP ₁ BilogP ₂ When the value is low, the logP value of SP1 in the formula (1) is preferably 0.7 or less, more preferably 0.5 or less. On the other hand, when P1 in the above formula (1) is obtainable by polymerization of a (meth) acrylate, and logP ₁ Ratio log P ₂ When the value is high, the logP value of SP1 in the formula (1) is preferably 3.7 or more, more preferably 4.2 or more.

Examples of the structure having a logP value of 1 or less include an oxyethylene structure and an oxypropylene structure. Examples of the structure having a logP value of not less than 6 include a polysiloxane structure and a fluorinated alkylene structure.

< repeating Unit (2) >)

The polymeric liquid crystal compound of the present invention may further include a repeating unit represented by the following formula (2) (also referred to as "repeating unit (2)" in the present specification). This has advantages that the solubility of the polymeric liquid crystalline compound in a solvent is improved, and the liquid crystal phase transition temperature can be easily adjusted.

In the formula (2), the difference between the logP values of P2, L2 and SP2 and the logP value of M2 is less than 4. That is, the repeating unit (2) is different from the above-described repeating unit (1) at least in the difference in logP value in the structure.

The definition of "logP values of P2, L2 and SP 2" and the logP mentioned above ₁ The same applies to the above description, and therefore, the description thereof will be omitted.

When the polymeric liquid crystal compound contains the repeating unit (2), the polymeric liquid crystal compound is a copolymer of the repeating unit (1) and the repeating unit (2), and may be any of block polymers, alternating polymers, random polymers, graft polymers, and the like.

[ chemical formula 6]

In formula (2), P2 represents a main chain of the repeating unit, L2 represents a single bond or a 2-valent linking group, SP2 represents a spacer group, M2 represents a mesogenic group, and T2 represents a terminal group.

Specific examples of P2, L2, SP2, M2, and T2 in formula (2) are the same as those of P1, L1, SP1, M1, and T1 in formula (1), respectively.

Among them, T2 in formula (2) preferably has a polymerizable group from the viewpoint of improving the strength of the light absorption anisotropic film.

The content of the repeating unit (2) is preferably 0.5 to 50% by mass, and more preferably 1 to 40% by mass, based on 100% by mass of the total repeating units of the polymer liquid crystal compound.

The repeating unit (2) may be contained in the polymeric liquid crystal compound alone or in combination of two or more. When two or more kinds of the repeating units (2) are contained, the total amount thereof is preferably within the above range.

In particular, when T2 in the repeating unit (2) has a polymerizable group, the content of the repeating unit (2) having a polymerizable group in T2 is preferably 0.5 to 60% by mass, and more preferably 1 to 40% by mass, based on 100% by mass of the total repeating units of the polymeric liquid crystal compound. When the content of the repeating unit (2) having a polymerizable group in T2 is 0.5% by mass or more, the strength of the light absorption anisotropic film is further improved. When the content of the repeating unit (2) having a polymerizable group in T2 is 60% by mass or less, there is an advantage that the degree of orientation is further excellent.

< repeating Unit (3) >)

The polymeric liquid crystal compound of the present invention may further contain a repeating unit represented by the following formula (3) (in the present specification, also referred to as "repeating unit (3)"). This has advantages that the solubility of the polymeric liquid crystal compound in a solvent is improved, and the adjustment of the liquid crystal phase transition temperature is facilitated.

The repeating unit (3) is different from the repeating unit (1) and the repeating unit (2) at least in that it does not have a mesogenic group.

When the polymeric liquid crystal compound contains the repeating unit (3), the polymeric liquid crystal compound may be any of a copolymer of the repeating unit (1) and the repeating unit (3) (or a copolymer containing the repeating unit (2)), a block polymer, an alternating polymer, a random polymer, a graft polymer, and the like.

[ chemical formula 7]

In formula (3), P3 represents a main chain of a repeating unit, L3 represents a single bond or a 2-valent linking group, SP3 represents a spacer group, and T3 represents a terminal group.

Specific examples of P3, L3, SP3 and T3 in formula (3) are the same as those of P1, L1, SP1 and T1 in formula (1), respectively.

Among them, T3 in the formula (3) preferably has a polymerizable group from the viewpoint of improving the strength of the light absorption anisotropic film.

The content of the repeating unit (3) is preferably 0.5 to 40% by mass, and more preferably 1 to 30% by mass, based on 100% by mass of the total repeating units of the polymer liquid crystal compound.

The repeating unit (3) may be contained singly or in two or more kinds in the polymer liquid crystal compound. When two or more kinds of the repeating units (3) are contained, the total amount thereof is preferably within the above range.

In particular, when T3 in the repeating unit (3) has a polymerizable group, the content of the repeating unit (3) having a polymerizable group in T3 is preferably 0.5 to 60% by mass, and more preferably 1 to 40% by mass, based on 100% by mass of the total repeating units of the polymeric liquid crystal compound. When the content of the repeating unit (3) having a polymerizable group in T3 is 0.5% by mass or more, the strength of the light absorption anisotropic film is improved. When the content of the repeating unit (3) having a polymerizable group in T3 is 60% by mass or less, there is an advantage that the degree of orientation is excellent.

< Star Polymer >

The polymeric liquid crystalline compound of the present invention may be a star polymer. The star polymer in the present invention is a polymer having 3 or more polymer chains extending from a core, and is specifically represented by the following formula (4).

The star polymer represented by formula (4) as a polymeric liquid crystal compound has high solubility (excellent solubility in a solvent) and can form a light-absorbing anisotropic film having a high degree of orientation.

[ chemical formula 8]

In the formula (4), n _A Represents an integer of 3 or more, preferably an integer of 4 or more. n is _A The upper limit of (b) is not limited thereto, but is usually 12 or less, preferably 6 or less.

Each of the plurality of PIs independently contains a polymer chain of any one of the repeating units represented by the above formulae (1) to (3). Wherein at least one of the plurality of PIs represents a polymer chain including a repeating unit represented by the above formula (1).

Preferably, all of the plurality of PIs are polymer chains including a repeating unit represented by the above formula (1).

A represents a radical which becomes a core of the star polymer. Specific examples of A include the structures obtained by removing a hydrogen atom from a thiol group of a polyfunctional thiol compound described in paragraphs [0052] to [0058] of Japanese patent application laid-open No. 2011-074280, paragraphs [0017] to [0021] of Japanese patent application laid-open No. 2012-189847, paragraphs [0012] to [0024] of Japanese patent application laid-open No. 2013-031986, and paragraphs [0118] to [0142] of Japanese patent application laid-open No. 2014-104631. In this case, a and PI are bonded via a thioether bond.

The number of thiol groups of the polyfunctional thiol compound which is a source of a is preferably 3, and more preferably 4. The upper limit of the number of thiol groups of the polyfunctional thiol compound is usually 12 or less, and preferably 6 or less.

Specific examples of the polyfunctional thiol compound are shown below.

[ chemical formula 9]

[ chemical formula 10]

< physical Property >

The weight average molecular weight (Mw) of the polymeric liquid crystal compound is preferably 1000 to 500000, more preferably 2000 to 300000. When the Mw of the polymeric liquid crystal compound is within the above range, handling of the polymeric liquid crystal compound becomes easy.

In particular, the weight average molecular weight (Mw) of the polymeric liquid crystal compound is preferably 10000 or more, and more preferably 10000 to 300000, from the viewpoint of suppressing cracks at the time of coating.

In view of temperature latitude of the orientation degree, the weight average molecular weight (Mw) of the polymeric liquid crystal compound is preferably less than 10000, more preferably 2000 or more and less than 10000.

The weight average molecular weight and the number average molecular weight in the present invention are values measured by a gel permeation chromatography (GP C) method.

Solvent (eluent): n-methyl pyrrolidone

The device name: TOSOH HLC-8220GPC

Column: 3 TOSOH TSKgelSuperAWM-H (6 mm. Times.15 cm) were ligated and used

Column temperature: 25 deg.C

Sample concentration: 0.1% by mass

Flow rate: 0.35mL/min

Calibration curve: calibration curves of 7 samples were used, based on TSK standard polystyrene manufactured by TOSOH CORPORATION, mw =2800000 to 1050 (Mw/Mn =1.03 to 1.06)

The liquid crystallinity of the polymeric liquid crystal compound may be either nematic or smectic, but at least nematic is preferred.

The temperature range in which the nematic phase is exhibited is preferably from room temperature (23 ℃) to 450 ℃, and from the viewpoint of handling or manufacturing suitability, preferably from 50 ℃ to 400 ℃.

[ dichroic substance ]

The dichroic material contained in the liquid crystal composition of the present invention is not particularly limited, and examples thereof include visible light absorbing materials (dichroic dye), luminescent materials (fluorescent material and phosphorescent material), ultraviolet absorbing materials, infrared absorbing materials, nonlinear optical materials, carbon nanotubes, inorganic materials (e.g., quantum rods), and the like, and conventionally known dichroic materials (dichroic dye) can be used.

In particular, the method of manufacturing a semiconductor device, examples thereof include [0067] to [0071] of Japanese patent laid-open publication No. 2013-228706, [0008] to [0026] of Japanese patent laid-open publication No. 2013-227532, [0008] to [0015] of Japanese patent laid-open publication No. 2013-209367, [0045] to [0058] of Japanese patent laid-open publication No. 2013-014883, [0012] to [0029] of Japanese patent laid-open publication No. 2013-109090, [0009] to [0017] of Japanese patent laid-open publication No. 2013-101328, [0051] to [0065] of Japanese patent laid-open publication No. 2013-06338753, [0049] to [0013] of Japanese patent laid-open publication No. 11-036 ] [0018] of Japanese patent laid-open publication No. 2013-037353, [ 0001339 ] to [0011] of Japanese patent laid-open publication No. 2012-063387, [ 00769 ] to [ 2011-00321569 ] and [ 01242 ] of Japanese patent laid-007242 paragraphs [0011] to [0025] of Japanese patent application laid-open No. 2010-215846, paragraphs [0017] to [0069] of Japanese patent application laid-open No. 2011-048311, paragraphs [0013] to [0133] of Japanese patent application laid-open No. 2011-213610, paragraphs [0074] to [0246] of Japanese patent application laid-open No. 2011-237513, paragraphs [0022] to [0080] of Japanese patent application laid-open No. 2015-001425, paragraphs [0005] to [0051] of Japanese patent application laid-open No. 006502, paragraphs [0005] to [0041] of WO2016/060173, paragraphs [0008] to [0062] of WO patent application laid-open No. 04490014 ] to [0033] of Japanese patent application laid-open No. 2016, paragraphs [0014] to [ 0032016 ] of Japanese patent application laid-open No. 2016 4910, paragraphs [0033] to [ 0032016 ] of Japanese patent application laid-0015907, and [0033] of Japanese patent application laid-open No. 0032016, the dichroic substances described in paragraphs [0014] to [0034] of Japanese patent application laid-open No. 2017-045296.

In the present invention, two or more kinds of dichroic substances may be used simultaneously, and for example, from the viewpoint of making the light absorption anisotropic film approach black, it is preferable to use at least one kind of dye compound having a maximum absorption wavelength in the wavelength range of 370 to 550nm and at least one kind of dye compound having a maximum absorption wavelength in the wavelength range of 500 to 700nm simultaneously.

In the present invention, the dichroic material preferably has a crosslinkable group because the resistance to pressure is further improved.

Specific examples of the crosslinkable group include a (meth) acryloyl group, an epoxy group, an oxetanyl group, and a styryl group, and among them, a (meth) acryloyl group is preferable.

In the present invention, the content of the dichroic substance is preferably 2 to 400 parts by mass, more preferably 3 to 300 parts by mass, and even more preferably 4 to 200 parts by mass, per 100 parts by mass of the polymer compound, from the viewpoint of improving the balance between the degree of alignment and uniformity of the light-absorbing anisotropic film.

[ polymerization initiator ]

The liquid crystalline composition used in the present invention preferably contains a polymerization initiator.

The polymerization initiator is not particularly limited, and is preferably a compound having photosensitivity, that is, a photopolymerization initiator.

As the photopolymerization initiator, various compounds can be used without particular limitation. Examples of the photopolymerization initiator include an α -carbonyl compound (each of the specifications of U.S. Pat. nos. 2367661 and 2367670), an acyloin ether (each of the specifications of U.S. Pat. No. 2448828), an α -hydrocarbon-substituted aromatic acyloin compound (each of the specifications of U.S. Pat. No. 2722512), a polyquinone compound (each of the specifications of U.S. Pat. nos. 3046127 and 2951758), a combination of a triarylimidazole dimer and p-aminophenyl ketone (each of the specifications of U.S. Pat. No. 3549367), an acridine and phenazine compound (each of the specifications of japanese patent laid-open publication nos. 60-105667 and 3942850), an oxadiazole compound (each of the specifications of U.S. Pat. No. 4212970), and an acylphosphine oxide compound (each of japanese patent publication nos. 63-40799, 5-29234, 10-95788, and 10-29997), and the like.

As such photopolymerization initiators, commercially available ones can be used, and examples thereof include IRGAC URE 184, IRGACURE 907, IRGACURE 369, IRGACURE 651, IRGACURE 819, IRG ACURE OXE-01 and IRGACURE OXE-02 manufactured by BASF corporation.

When the liquid crystalline composition of the present invention contains a polymerization initiator, the content of the polymerization initiator is preferably 0.01 to 30 parts by mass, and more preferably 0.1 to 15 parts by mass, based on 100 parts by mass of the total of the dichroic material and the polymeric liquid crystalline substance in the liquid crystalline composition. The content of the polymerization initiator is 0.01 parts by mass or more, whereby the durability of the light absorption anisotropic film becomes good, and is 30 parts by mass or less, whereby the orientation of the light absorption anisotropic film becomes good.

[ solvent ]

The liquid crystalline composition of the present invention preferably contains a solvent from the viewpoint of handling properties.

Examples of the solvent include ketones (e.g., acetone, 2-butanone, methyl isobutyl ketone, cyclopentanone, cyclohexanone, etc.), ethers (e.g., dioxane, tetrahydrofuran, 2-methyltetrahydrofuran, cyclopentylmethyl ether, tetrahydropyran, dioxolane, etc.), aliphatic hydrocarbons (e.g., hexane, etc.), alicyclic hydrocarbons (e.g., cyclohexane, etc.), aromatic hydrocarbons (e.g., benzene, toluene, xylene, trimethylbenzene, etc.), halogenated carbons (e.g., dichloromethane, trichloromethane, dichloroethane, dichlorobenzene, chlorotoluene, etc.), esters (e.g., methyl acetate, ethyl acetate, butyl acetate, ethyl lactate, etc.), alcohols (e.g., ethanol, isopropanol, propanol, cyclohexanol, isoamyl alcohol, neopentyl alcohol, diacetone alcohol, benzyl alcohol, etc.), cellosolves (e.g., methyl cellosolve, ethyl cellosolve, 1, 2-dimethoxyethane, etc.), cellosolve acetates, sulfoxides (e.g., dimethyl sulfoxide, etc.), amides (e.g., dimethylformamide, dimethylacetamide, N-methylpyrrolidone, N-ethylpyrrolidone, etc.), and pyridine (e.g., pyridine), and organic solvents and water. These solvents may be used alone or in combination of two or more.

Among these solvents, ketones (in particular, cyclopentanone and cyclohexanone), ethers (in particular, tetrahydrofuran, cyclopentylmethyl ether, tetrahydropyran and dioxolane), and amides (in particular, dimethylformamide, dimethylacetamide, N-methylpyrrolidone and N-ethylpyrrolidone) are preferable from the viewpoint of exhibiting an effect of excellent solubility.

When the liquid crystalline composition of the present invention contains a solvent, the content of the solvent is preferably 80 to 99% by mass, more preferably 83 to 98% by mass, and still more preferably 85 to 96% by mass, based on the total mass of the liquid crystalline composition.

[ surface improver ]

The liquid crystalline composition of the present invention preferably contains a surface modifier. The inclusion of the surface improver improves the smoothness of the coated surface, improves the degree of orientation, and suppresses dishing and unevenness, thereby improving the in-plane uniformity.

As the surface improver, a liquid crystal compound is preferably made horizontal on the coating surface side, and the compounds (horizontal alignment agents) described in paragraphs [0253] to [0293] of japanese patent application laid-open No. 2011-237513 can be used. Furthermore, a fluoro (meth) acrylate polymer described in paragraphs [0018] to [0043] of Japanese patent application laid-open No. 2007-272185 can also be used. As the surface improver, compounds other than these can be used.

When the liquid crystalline composition of the present invention contains the surface modifier, the content of the surface modifier is preferably 0.001 to 5 parts by mass, and more preferably 0.01 to 3 parts by mass, based on 100 parts by mass of the total of the dichroic substance and the polymeric liquid crystalline compound in the liquid crystalline composition.

[ light absorption anisotropic film ]

The light absorption anisotropic film of the present invention is a light absorption anisotropic film formed using the liquid crystalline composition of the present invention.

An example of the method for producing the light absorption anisotropic film of the present invention includes a method including a step of applying the liquid crystalline composition to a substrate to form a coating film (hereinafter, also referred to as a "coating film forming step") and a step of aligning a dichroic material contained in the coating film (hereinafter, also referred to as an "aligning step") in this order.

Hereinafter, each step of the method for producing the light absorption anisotropic film of the present invention will be described.

[ coating film formation Process ]

The coating film forming step is a step of forming a coating film by coating the liquid crystalline composition on a substrate.

By using a liquid crystalline composition containing the above solvent or using the liquid crystalline composition as a liquid such as a melt by heating or the like, the liquid crystalline composition can be easily applied to a substrate.

Examples of the coating method of the liquid crystalline composition include known methods such as a roll coating method, a gravure printing method, a spin coating method, a wire bar coating method, an extrusion coating method, a direct gravure coating method, a reverse gravure coating method, a die coating method, a spray coating method, and an ink jet method.

In this embodiment, an example in which the liquid crystalline composition is applied to the substrate is shown, but the liquid crystalline composition is not limited to this, and for example, the liquid crystalline composition may be applied to an alignment film provided on the substrate. The details of the substrate and the alignment film will be described later.

[ orientation procedure ]

The alignment step is a step of aligning the dichroic material contained in the coating film. Thus, a light absorption anisotropic film can be obtained.

The orientation step may include a drying process. The drying treatment can remove components such as solvent from the coating film. The drying treatment may be performed by a method of leaving the coating film at room temperature for a predetermined time (for example, natural drying), or may be performed by a method of heating and/or blowing air.

Here, the dichroic material contained in the liquid crystalline composition may be aligned by the above-described coating film forming step or drying treatment. For example, in a mode of preparing a liquid crystalline composition as a coating liquid containing a solvent, a coating film having light absorption anisotropy (that is, a light absorption anisotropic film) can be obtained by drying the coating film and removing the solvent from the coating film.

The alignment step preferably includes heat treatment. Accordingly, the dichroic material contained in the coating film can be aligned, and therefore the coating film after the heat treatment can be preferably used as a light absorption anisotropic film.

The heat treatment is preferably 10 to 250 ℃ and more preferably 25 to 190 ℃ from the viewpoint of manufacturing suitability. The heating time is preferably 1 to 300 seconds, more preferably 1 to 60 seconds.

The orientation step may include a cooling treatment performed after the heating treatment. The cooling treatment is a treatment of cooling the heated coating film to about room temperature (20 to 25 ℃). This can fix the orientation of the dichroic material contained in the coating film. The cooling method is not particularly limited, and can be performed by a known method.

The light absorption anisotropic film can be obtained by the above steps.

In the present embodiment, examples of the method for aligning the dichroic material contained in the coating film include a drying treatment and a heating treatment, but the method is not limited thereto and can be performed by a known alignment treatment.

[ other procedures ]

The method for producing the light absorption anisotropic film may include a step of curing the light absorption anisotropic film after the alignment step (hereinafter, also referred to as a "curing step").

The curing step can be performed by, for example, heating and/or light irradiation (exposure). Among them, the curing step is preferably performed by light irradiation.

The light source used for curing can be various light sources such as infrared light, visible light, or ultraviolet light, but ultraviolet light is preferable. In addition, during curing, ultraviolet rays may be irradiated while heating, or ultraviolet rays may be irradiated through a filter that transmits only a specific wavelength.

Also, the exposure may be performed under a nitrogen atmosphere. When curing of the light-absorbing anisotropic film is performed by radical polymerization, inhibition of polymerization by oxygen can be reduced, and therefore, exposure to nitrogen is preferable.

The thickness of the light absorption anisotropic film is preferably 0.1 to 5.0. Mu.m, and more preferably 0.3 to 1.5. Mu.m. Depending on the concentration of the dichroic material in the liquid crystal composition, a light-absorbing anisotropic film having an excellent absorbance can be obtained when the film thickness is 0.1 μm or more, and a light-absorbing anisotropic film having an excellent transmittance can be obtained when the film thickness is 5.0 μm or less.

[ laminate ]

The laminate of the present invention has a base material and the light absorption anisotropic film of the present invention provided on the base material.

The laminate of the present invention may have a λ/4 plate on the light absorption anisotropic film.

In the laminate of the present invention, an alignment film may be optionally provided between the substrate and the light absorption anisotropic film.

Further, the laminate of the present invention may have a barrier layer between the light absorption anisotropic film and the λ/4 plate.

The layers constituting the laminate of the present invention will be described below.

[ base material ]

The substrate can be selected according to the application of the light absorption anisotropic film, and examples thereof include glass and polymer films. The light transmittance of the substrate is preferably 80% or more.

When a polymer film is used as the substrate, it is preferable to use an optically isotropic polymer film. Specific examples and preferred embodiments of the polymer can be applied to the description in paragraph [0013] of Japanese patent application laid-open No. 2002-022942. Further, even in the case of a polymer which is easily developed birefringence, such as conventionally known polycarbonate or polysulfone, a substrate whose developability is reduced by modifying the molecule described in International publication No. 2000/26705 can be used.

[ light absorption anisotropic film ]

The light absorption anisotropic film is as described above, and therefore, the description thereof is omitted.

[ lambda/4 plate ]

The "λ/4 plate" refers to a plate having a λ/4 function, specifically, a plate having a function of converting linearly polarized light of a certain specific wavelength into circularly polarized light (or converting circularly polarized light into linearly polarized light).

For example, as an embodiment in which the λ/4 plate has a single-layer structure, specifically, an extended polymer film, a retardation film in which an optically anisotropic layer having a λ/4 function is provided on a support, or the like is given, and as an embodiment in which the λ/4 plate has a multilayer structure, specifically, a broadband λ/4 plate in which a λ/4 plate and a λ/2 plate are laminated is given.

The λ/4 plate and the light absorption anisotropic film may be provided in contact with each other, or another layer may be provided between the λ/4 plate and the light absorption anisotropic film. Examples of such layers include an adhesive layer, and a barrier layer for securing adhesion.

[ Barrier layer ]

When the laminate of the present invention has a barrier layer, the barrier layer is disposed between the light absorbing anisotropic film and the λ/4 plate. In addition, when another layer (for example, an adhesive layer or an adhesive layer) other than the barrier layer is provided between the light absorption anisotropic film and the λ/4 plate, the barrier layer can be provided, for example, between the light absorption anisotropic film and the other layer.

The barrier layer is also called a gas barrier layer (oxygen barrier layer), and has a function of protecting the light-absorbing anisotropic film from gas such as oxygen in the atmosphere, moisture, or a compound contained in an adjacent layer.

As the barrier layer, there can be mentioned paragraphs [0014] to [0054] of Japanese patent application laid-open No. 2014-159124, paragraphs [0042] to [0075] of Japanese patent application laid-open No. 2017-121721, paragraphs [0045] to [0054] of Japanese patent application laid-open No. 2017-115076, paragraphs [0010] to [0061] of Japanese patent application laid-open No. 2012-213938, and paragraphs [0021] to [0031] of Japanese patent application laid-open No. 2005-1699994.

[ alignment film ]

The laminate of the present invention may have an alignment film between the substrate and the light absorption anisotropic film.

The alignment film may be any layer as long as the dichroic material contained in the liquid crystal composition of the present invention can be aligned in a desired state on the alignment film.

The method can be used for example by rubbing treatment of an organic compound (preferably a polymer) on the surface of a film, oblique deposition of an inorganic compound, formation of a layer having microgrooves, or accumulation of an organic compound (for example, ω -tricosanoic acid, dioctadecyl methylammonium chloride, methyl stearate) by a Langmuir-Blodgett method (LB film). Further, an alignment film that generates an alignment function by application of an electric field, application of a magnetic field, or light irradiation is also known. Among them, in the present invention, an alignment film formed by rubbing treatment is preferable in terms of ease of controlling the pretilt angle of the alignment film, and a photo-alignment film formed by light irradiation is also preferable in terms of alignment uniformity.

< rubbing treatment of alignment film >

Many documents describe polymer materials used for alignment films formed by rubbing treatment, and many commercially available products can be obtained. In the present invention, polyvinyl alcohol or polyimide and derivatives thereof are preferably used. For the alignment film, reference can be made to the description of line 24 on page 43 to line 8 on page 49 of International publication No. 2001/88574A 1. The thickness of the alignment film is preferably 0.01 to 10 μm, and more preferably 0.01 to 1 μm.

< photo-alignment film >

Many documents and the like describe photo-alignment materials used for alignment films formed by light irradiation. In the present invention, preferable examples include, for example, japanese patent application laid-open No. 2006-285197, japanese patent application laid-open No. 2007-76839, japanese patent application laid-open No. 2007-138138, japanese patent application laid-open No. 2007-94071, japanese patent application laid-open No. 2007-121721, japanese patent application laid-open No. 2007-140465, japanese patent application laid-open No. 2007-156439, japanese patent application laid-open No. 2007-133184, japanese patent application laid-open No. 2009-109831, japanese patent No. 3883848, an azo compound described in Japanese patent No. 4151746, an aromatic ester compound described in Japanese patent application laid-open No. 2002-229039, japanese patent application laid-open No. 2002-265541, a maleimide and/or alkenyl-substituted nadimide (nadimide) compound having a photo-orientation unit described in Japanese patent application laid-open No. 2002-317013, a photo-crosslinkable silane derivative described in Japanese patent application laid-open No. 4205195, japanese patent application laid-open No. 4205198, a photo-crosslinkable silane derivative described in Japanese patent laid-open No. 2003-5208, japanese patent application laid-open No. 52525220, or Japanese patent application laid-open No. 4204141850, or a photo-crosslinkable polyamide ester described in Japanese patent publication No. 4204141412004. More preferably an azo compound, a photocrosslinkable polyimide, a polyamide or an ester.

The photo-alignment film is manufactured by irradiating a photo-alignment film formed of the above-described material with linearly polarized light or non-polarized light.

In the present specification, "linearly polarized light irradiation" and "unpolarized light irradiation" refer to operations for causing photoreaction of the photo-alignment material. The wavelength of light used differs depending on the photo-alignment material used, and is not particularly limited as long as it is a wavelength required for the photoreaction. The peak wavelength of light used for light irradiation is preferably 200nm to 700nm, and more preferably ultraviolet light having a peak wavelength of light of 400nm or less.

Examples of the light source used for light irradiation include commonly used light sources such as a tungsten lamp, a halogen lamp, a xenon flash lamp, a mercury lamp, a xenon-mercury lamp, and a carbon arc lamp, various lasers [ for example, a semiconductor laser, a helium-neon laser, an argon ion laser, a helium-cadmium laser, and a YAG laser ], a light emitting diode, and a cathode ray tube.

As a method for obtaining linearly polarized light, a method using a polarizing plate (e.g., an iodine polarizing plate, a dichroic dye polarizing plate, a wire grid polarizing plate), a method using a reflective polarizer using a prism-based element (e.g., a Glan-thompson prism) or a Brewster angle, or a method using light emitted from a laser light source having polarized light can be employed. Further, only light of a desired wavelength may be selectively irradiated using a filter, a wavelength conversion element, or the like.

When the irradiated light is linearly polarized light, a method of irradiating the alignment film with light from the upper surface or the back surface perpendicular to or inclined from the surface of the alignment film may be employed. The angle of incidence of light varies depending on the photo-alignment material, and is preferably 0 to 90 ° (perpendicular), more preferably 40 to 90 °.

When the light is unpolarized, the alignment film is irradiated with unpolarized light from an oblique direction. The incident angle is preferably 10 to 80 °, more preferably 20 to 60 °, and still more preferably 30 to 50 °.

The irradiation time is preferably 1 minute to 60 minutes, more preferably 1 minute to 10 minutes.

When patterning is required, a method of irradiating light using a photomask as many times as necessary for pattern formation or a method of writing a pattern by laser scanning can be employed.

[ use ]

The laminate of the present invention can be used as a polarizing element (polarizing plate), for example, a linear polarizing plate or a circular polarizing plate.

When the laminate of the present invention does not have the optically anisotropic layer such as the λ/4 plate described above, the laminate can be used as a linearly polarizing plate. On the other hand, when the laminate of the present invention has the above λ/4 plate, the laminate can be used as a circularly polarizing plate.

[ image display apparatus ]

The image display device of the present invention has the light absorption anisotropic film or the laminate.

The display element used in the image display device of the present invention is not particularly limited, and examples thereof include a liquid crystal cell, an organic electroluminescence (hereinafter, abbreviated as "EL") display panel, and a plasma display panel.

Among these, a liquid crystal cell or an organic EL display panel is preferable, and a liquid crystal cell is more preferable. That is, the image display device of the present invention is preferably a liquid crystal display device using a liquid crystal cell as a display element, an organic EL display device using an organic EL display panel as a display element, and more preferably a liquid crystal display element.

[ liquid Crystal display device ]

A liquid crystal display device as an example of the image display device of the present invention preferably includes a liquid crystal display device having the light absorption anisotropic film and the liquid crystal cell. More preferably, the liquid crystal display device includes the laminate (not including the λ/4 plate) and the liquid crystal cell.

In the present invention, the light-absorbing anisotropic film (laminate) of the present invention is preferably used as the polarizing element on the front surface side, and more preferably used as the polarizing elements on the front surface side and the back surface side, of the light-absorbing anisotropic film (laminate) provided on both sides of the liquid crystal cell.

Hereinafter, a liquid crystal cell constituting the liquid crystal display device will be described in detail.

< liquid crystal cell >

The liquid crystal cell used In the liquid crystal display device is preferably a VA (Vertical Alignment: vertical Alignment) mode, an OCB (Optically Compensated Bend) mode, an IPS (In-Plane-Switching) mode, or a TN (Twisted Nematic) mode, but is not limited thereto.

With the TN-mode liquid crystal cell, rod-like liquid crystalline molecules are substantially horizontally aligned when no voltage is applied, and are also twisted aligned at 60 to 120 °. TN mode liquid crystal cells are most widely used as color TFT (Thin Film transistor) liquid crystal display devices, and are described in many documents.

In the VA mode liquid crystal cell, rod-like liquid crystalline molecules are aligned substantially vertically when a voltage is applied. The VA mode liquid crystal cell includes (1) a narrow VA mode liquid crystal cell (described in japanese patent laid-open No. h 2-176625) in which rod-like liquid crystal molecules are aligned substantially vertically when no voltage is applied and aligned substantially horizontally when a voltage is applied, and (2) an MVA mode liquid crystal cell (SID 97, digest of tech. Papers 28 (1997) 845) in which VA mode is multi-domain in order to enlarge a viewing angle, (3) a mode liquid crystal cell (n-ASM mode) in which liquid crystal rod-like molecules are aligned substantially vertically when no voltage is applied and multi-domain alignment is distorted when a voltage is applied (described in proceedings 58 to 59 (1998) of the japan liquid crystal symposium), and (4) a liquid crystal cell (LCD international 98) of the surveyal mode. Further, any of a PVA (Patterned Vertical Alignment) type, a photo-Alignment type (Optical Alignment men t) and a PSA (Polymer-stabilized Alignment) type may be used. The details of these modes are described in detail in Japanese patent application laid-open No. 2006-215326 and Japanese patent application laid-open No. 2008-538819.

In the IPS mode liquid crystal cell, rod-like liquid crystalline molecules are aligned substantially parallel to the substrate, and the liquid crystal molecules respond in plane by applying a parallel electric field to the substrate surface. The IPS mode displays black in a state where no electric field is applied, and absorption axes of a pair of upper and lower polarizing plates are orthogonal to each other. Methods for reducing light leakage in black display in an oblique direction and improving a viewing angle by using an optical compensation sheet are disclosed in japanese patent application laid-open nos. 10-054982, 11-202323, 9-292522, 11-133408, 11-305217, and 10-307291.

[ organic EL display device ]

An organic EL display device, which is an example of the image display device of the present invention, preferably has a light absorption anisotropic film, a λ/4 plate, and an organic EL display panel in this order from the viewing side.

More preferably, the laminate and the organic EL display panel described above each having a λ/4 plate are provided in this order from the viewing side. In this case, the laminate is provided with a base material, an alignment film provided as needed, a light absorption anisotropic film, a barrier layer provided as needed, and a λ/4 plate in this order from the viewing side.

The organic EL display panel is a display panel configured using an organic EL element in which an organic light-emitting layer (organic electroluminescent layer) is sandwiched between electrodes (between a cathode and an anode). The structure of the organic EL display panel is not particularly limited, and a known structure can be adopted.

Examples

The present invention will be described in further detail with reference to examples. The materials, the amounts used, the ratios, the contents of the processes, the steps of the processes, and the like shown in the following examples can be appropriately modified without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the examples shown below.

[ Synthesis example 1]

[ Synthesis of Polymer liquid Crystal Compound P1 ]

The polymer liquid crystal compound P1 is produced by the following procedure.

< Synthesis of P1-1 >

[ chemical formula 11]

Dibutylhydroxytoluene (BHT) (100 mg) was added to a dimethylacetamide (DMAc) solution (60 mL) of 2-chloroethoxyethoxyethanol (14.05 g), and acryloyl chloride (7.54 g) and triethylamine (8.89 g) were added dropwise under ice-cooling. After stirring for 1 hour, the reaction solution was filtered. Subsequently, potassium carbonate (15.7 g), potassium iodide (0.57 g), p-hydroxybenzaldehyde (9.25 g), and dibutylhydroxytoluene (BHT) (100 mg) were added thereto, and after stirring at 110 ℃ for 4 hours, ethyl acetate and water were added, and the reaction solution was washed by a liquid separation operation. After the reaction mixture was concentrated by an evaporator, the temperature was returned to room temperature, and 25mL of acetonitrile, 2.36g of sodium dihydrogen phosphate dihydrate dissolved in 8mL of water, and 11.2mL of hydrogen peroxide (30 mass%) were added, followed by 33.4g of a 25 mass% aqueous sodium chlorite solution. After stirring at room temperature for 6 hours and standing for 8 hours, the resulting precipitate was collected by adding water, whereby 16.9g (yield 69%) of a compound (P1-1) was obtained as a white solid.

< Synthesis of P1-2 >

[ chemical formula 12]

To a solution of methanesulfonyl chloride (MsCl) (73.4mmol, 5.7 mL) in Tetrahydrofuran (THF) (70 mL) was added dibutylhydroxytoluene (BHT) (200 mg), which was cooled to an internal temperature of-5 ℃. A THF solution of the compound (P1-1) (66.7mmol, 21.6 g) and Diisopropylethylamine (DIPEA) (75.6mmol, 13.0 mL) was added dropwise thereto so that the internal temperature did not rise to 0 ℃ or higher. After stirring at-5 ℃ for 30 minutes, N-dimethyl-4-aminopyridine (DMAP) (200 mg) was added thereto, and a solution of diisopropylethylamine (75.6 mmol,13.0 mL) and 4-hydroxy-4' -methoxybiphenyl (60.6 mmol,12.1 g) in Tetrahydrofuran (THF) and dimethylacetamide (DM Ac) was added dropwise so that the internal temperature did not rise to 0 ℃ or higher. Then, the mixture was stirred at room temperature for 4 hours. Methanol (5 mL) was added to stop the reaction, and then water and ethyl acetate were added. The organic layer extracted with ethyl acetate was subjected to solvent removal using a rotary evaporator and purification by column chromatography using ethyl acetate and hexane to obtain 18.7g (yield 61%) of compound (P1-2) as a white solid.

¹ H-NMR (solvent: CDCl) ₃ )δ(ppm)：3.65-3.82(m,6H),3.85(s,3H),3.85-3.95(m,2H),4.18-4.28(m,2H),4.28-4.40(m,2H),5.82(dd,1H),6.15(dd,1H),6.43(dd,1H),6.90-7.05(m,4H),7.20-7.30(m,2H),7.45-7.65(m,4H),8.10-8.20(m,2H)

< Synthesis of P1 >

[ chemical formula 13]

A DMAc solution (3.3 mL) of the compound (P1-2) (1.0 g) was heated under nitrogen to an internal temperature of 80 ℃. To this was added a DMAc solution (0.5 mL) of 2,2' -azobis (2-methylpropionic acid) dimethyl (0.054mmol, 0.012g) (trade name "V-601", manufactured by Wako Pure Chemical, ltd.), and the mixture was stirred at 80 ℃ for 2 hours. Then, by ¹ H-NMR spectroscopic measurement confirmed the disappearance of the polymerizable group, and the reaction mixture was cooled to room temperature. Methanol was added thereto, filtration was performed, and the residue was washed with methanol to obtain 0.95g of compound (P1) as a white solid. The weight average molecular weight (Mw) of the obtained polymer was 10000.

The molecular weight was calculated in terms of polystyrene by Gel Permeation Chromatography (GPC), and TSKgel SuperHZM-H, TSKgel SuperHZ4000, and TSKgel SuperHZ2000 (manufactured by TOS OH CORPORATION) were used for the column, and N-methylpyrrolidone was used as a solvent.

[ Synthesis example 2]

[ Synthesis of Polymer liquid Crystal Compound P9 ]

A polymer liquid crystal compound P9 was synthesized according to the following steps 1 to 3.

< step 1 >

[ chemical formula 14]

Sodium hydroxide (34.2 g) was dissolved in 1L of water, and 4,4' -dihydroxybiphenyl (40.6 g) and bromoethanol (37.2 g) were added under nitrogen atmosphere and stirred at 95 ℃ for 10 hours.

Then, the reaction system was cooled to room temperature, adjusted to acidity by adding concentrated hydrochloric acid, and then filtered and dried to obtain a white solid containing the compound P9-a.

The obtained white solid was dissolved in 400mL of dimethylacetamide (DMAc), and 3-chloropropionyl chloride (62.0 g) was added dropwise under ice-cooling, and stirred for 5 hours. Methanol (40 mL) was added to stop the reaction, and then water and ethyl acetate were added.

The organic layer washed by the liquid separation operation was subjected to solvent removal by a rotary evaporator, and chloroform was added to the obtained concentrate. After the precipitated solid was removed by filtration, the solvent was removed by a rotary evaporator, and purification by column chromatography using ethyl acetate/chloroform was performed to obtain 20.3g (yield 29%) of compound P9-a as a white solid.

¹ H-NMR (solvent: DMSO-d) ₆ )δ(ppm)：2.80-2.90(t,2H),3.75-3.85(t,2H),4.15-4.25(m,2H),4.35-4.45(m,2H),6.75-6.85(m,2H),6.90-7.00(m,2H),7.30-7.50(m,4H),9.40(br s,1H)

< step 2 >

[ chemical formula 15]

4.0g of the compound P9-A, 8.08g of the compound P1-1 prepared in Synthesis example 1 and 100mL of methylene chloride were mixed and stirred at room temperature. To the mixture were added 152mg of N, N-dimethylaminopyridine and 9.56g of 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride (EDCI), and the mixture was stirred at room temperature for 12 hours.

Then, the solvent was removed by a rotary evaporator, and 120mL of methanol, 1M and 120mL of hydrochloric acid water were added to the mixture to carry out filtration, thereby obtaining a white solid. The obtained white solid was separated by adding ethyl acetate and water, and the collected organic layer was washed with 1N hydrochloric acid water and saturated brine, and then dried over anhydrous sodium sulfate. The sodium sulfate was filtered off, the solvent was removed by a rotary evaporator, and purification by silica gel chromatography was carried out to obtain 5.4g (yield 69%) of the compound P9-B.

¹ H-NMR (solvent: CDCl) ₃ )δ(ppm)：2.87(t,2H)、3.68-3.82(m,8H),3.90(t,2H),4.18-4.28(m,4H),4.28-4.38(m,2H),4.46-4.54(m,2H),5.84(dd,1H),6.16(dd,1H),6.43(dd,1H),6.90-7.05(m,4H),7.20-7.30(m,2H),7.48-7.65(m,4H),8.10-8.20(m,2H)

< step 3 >

[ chemical formula 16]

A DMAc solution (3.3 mL) of the compound P1-2 (0.8 g) and the compound P9-B (0.2 g) was heated under nitrogen to an internal temperature of 80 ℃. A DMAc solution (0.5 mL) of 2,2' -azobis (2-methylpropionic acid) dimethyl (0.054mmol, 0.012g) was added thereto, and stirred at 80 ℃ for 2 hours. Then, by ¹ The disappearance of the polymerizable group was confirmed by H-NMR spectroscopy, and the reaction mixture was cooled to room temperature. Methanol was added thereto, filtration was performed, and the residue was washed with methanol to obtain 0.90g of compound P9-C as a white solid. To a chloroform solution (7 mL) of the obtained compound P9-C were added dibutylhydroxytoluene (BHT) (50 mg) and triethylamine (0.7 mL), and the mixture was heated until the internal temperature became 50 ℃. After stirring for 9 hours at 50 ℃ by ¹ The disappearance of the starting material was confirmed by H-NMR spectroscopy and cooled to room temperature. Methanol was added thereto, filtration was performed, and the residue was washed with methanol to obtain 0.8g of a polymer liquid crystal compound P9 as a white solid. When the obtained polymeric liquid crystalline substance P9 was analyzed by Gel Permeation Chromatography (GPC), the weight average molecular weight (Mw) was 17000 (in terms of polystyrene).

[ Polymer liquid Crystal Compounds P2 to P8, P10 to P11 ]

The polymeric liquid crystal compounds P2 to P8 and P10 to P11 were synthesized in the same manner as or in a known manner as the polymeric liquid crystal compound P1 or the polymeric liquid crystal compound P9.

[ Synthesis of Polymer liquid Crystal Compound P12 ]

The polymeric liquid crystal compound P12 was synthesized according to the following steps 1 to 2.

< step 1 >

[ chemical formula 17]

Methyl 4- (4-hydroxyphenyl) benzoate was prepared by Journal of Polymer Science, part A: the synthesis was carried out by the method described in Polymer chemistry,2012, vol.50, p.3936-3943.

To an ethyl acetate solution (44 mL) of methanesulfonyl chloride (MsCl) (54.8mmol, 6.27g) was added 2, 6-tetramethylpiperidine 1-oxyl (68 mg), and the mixture was cooled to an inner temperature of-5 ℃. A THF solution of the compound (P1-1) (52.6 mmol,17.1 g) and Diisopropylethylamine (DIPEA) (57.0 mol, 7.36g) was added dropwise thereto so that the internal temperature did not rise to 0 ℃ or higher. After stirring at-5 ℃ for 30 minutes, a DMAc solution of methyl 4- (4-hydroxyphenyl) benzoate (43.8mmol, 10.0 g) and N-methyl-imidazole (NMI) (1.8 g) were added thereto, and diisopropylethylamine (75.6 mmol,13.0 mL) was added dropwise thereto so that the internal temperature did not rise to 0 ℃ or higher. Then, it was stirred at room temperature for 4 hours. The reaction was stopped by adding water and ethyl acetate. The organic layer extracted with ethyl acetate was subjected to liquid separation, and the solvent was removed by a rotary evaporator, followed by purification by column chromatography using ethyl acetate and hexane to obtain 20.4g (yield 87%) of compound (P12-a) as a white solid.

¹ H-NMR (solvent: CDCl) ₃ )δ(ppm)：3.68-3.80(m,6H),3.87-3.95(m,2H),3.95(s,3H),4.20-4.27(m,2H),4.31-4.37(m,2H),5.83(dd,1H),6.16(dd,1H),6.43(dd,1H),6.97-7.05(m,2H),7.28-7.35(m,2H),7.64-7.72(m,4H),8.08-8.20(m,4H)

< step 2 >

[ chemical formula 18]

A DMAc solution (3.3 mL) of the compound P1-2 (0.8 g) and the compound P12-A (0.2 g) was heated to an internal temperature of 80 ℃ under a nitrogen atmosphere. To this was added a DMAc solution (0.5 mL) of 2,2' -azobis (2-methylpropionic acid) dimethyl (0.054mmol, 0.012g) (trade name "V-601", manufactured by Wako Pure Chemical, ltd.), and the mixture was stirred at 80 ℃ for 2 hours. Then, by ¹ H-NMR spectroscopic measurement confirmed the disappearance of the polymerizable group, and the reaction mixture was cooled to room temperature. Methanol was added thereto, followed by filtration, and the residue was washed with methanol to obtain 0.95g of compound (P12) as a white solid. By gel permeation chromatography (GPC) the weight average molecular weight (mw) of the obtained polymeric liquid crystal compound P12 was 15000 (in terms of polystyrene).

[ Synthesis of Polymer liquid Crystal Compound P13 ]

The polymeric liquid crystal compound P13 was synthesized according to the following steps 1 to 2.

< step 1 >

[ chemical formula 19]

Ethyl 4- (4-hydroxyphenyl) benzoate was synthesized by the method described in Macromolecules,2002,35, 1663-1671.

To an ethyl acetate solution (44 mL) of methanesulfonyl chloride (MsCl) (54.8mmol, 6.27g) was added 2, 6-tetramethylpiperidine 1-oxyl (68 mg), and the mixture was cooled to an internal temperature of-5 ℃. A THF solution of the compound (P1-1) (52.6 mmol,17.1 g) and Diisopropylethylamine (DIPEA) (57.0 mol, 7.36g) was added dropwise thereto so that the internal temperature did not rise to 0 ℃ or higher. After stirring at-5 ℃ for 30 minutes, a DMAc solution of ethyl 4- (4-hydroxyphenyl) benzoate (43.8 mmol,10.6 g) and N-methyl-imidazole (NMI) (1.8 g) were added, and diisopropylethylamine (75.6 mmol,13.0 mL) was added dropwise so that the internal temperature did not rise to 0 ℃ or higher. Then, it was stirred at room temperature for 4 hours. The reaction was stopped by adding water and ethyl acetate. The organic layer extracted with ethyl acetate was subjected to liquid separation, and the solvent was removed by a rotary evaporator, followed by purification by column chromatography using ethyl acetate and hexane to obtain 20.6g (yield 86%) of compound (P13-a) as a white solid.

¹ H-NMR (solvent: CDCl) ₃ )δ(ppm)：1.41(t,3H),3.68-3.80(m,6H),3.88-3.95(m,2H),4.20-4.27(m,2H),4.31-4.38(m,2H),4.41(q,2H),5.83(dd,1H),6.16(dd,1H),6.43(dd,1H),6.97-7.05(m,2H),7.28-7.35(m,2H),7.64-7.72(m,4H),8.08-8.20(m,4H)

< step 2 >

[ chemical formula 20]

A DMAc solution (3.3 mL) of the compound P1-2 (0.8 g) and the compound P13-A (0.2 g) was heated to an internal temperature of 80 ℃ under nitrogen. To this was added a DMAc solution (0.5 mL) of 2,2' -azobis (2-methylpropionic acid) dimethyl (0.054mmol, 0.012g) (trade name "V-601", manufactured by Wako Pure Chemical, ltd.), and the mixture was stirred at 80 ℃ for 2 hours. Then, by ¹ The disappearance of the polymerizable group was confirmed by H-NMR spectroscopy, and the reaction mixture was cooled to room temperature. Methanol was added thereto and the mixture was filtered, and the residue was washed with methanol to obtain 0.96g of compound (P13) as a white solid. When the obtained polymeric liquid crystalline substance P13 was analyzed by Gel Permeation Chromatography (GPC), the weight average molecular weight (Mw) was 16000 (in terms of polystyrene).

[ Synthesis of Polymer liquid Crystal Compound P14 ]

A polymeric liquid crystal compound P14 was synthesized according to the following steps 1 to 2.

< step 1 >

[ chemical formula 21]

To an ethyl acetate solution (44 mL) of methanesulfonyl chloride (MsCl) (54.8mmol, 6.27g) was added 2, 6-tetramethylpiperidine 1-oxyl (68 mg), and the mixture was cooled to an inner temperature of-5 ℃. A THF solution of the compound (P1-1) (52.6 mmol,17.1 g) and Diisopropylethylamine (DIPEA) (57.0 mol, 7.36g) was added dropwise thereto so that the internal temperature did not rise to 0 ℃. After stirring at-5 ℃ for 30 minutes, a DMAc solution of 4-cyano-4' -hydroxybiphenyl (43.8mmol, 8.55g) and N-methyl-imidazole (NMI) (1.8 g) were added, and diisopropylethylamine (75.6 mmol,13.0 mL) was added dropwise so that the internal temperature did not rise to 0 ℃. Then, the mixture was stirred at room temperature for 4 hours. The reaction was stopped by adding water and ethyl acetate. The solvent was removed by a rotary evaporator for extraction with ethyl acetate, and purification by column chromatography using ethyl acetate and hexane was performed to obtain 19.0g (yield 87%) of the compound (P14-a) as a white solid.

¹ H-NMR (solvent: CDCl) ₃ )δ(ppm)：3.68-3.80(m,6H),3.87-3.95(m,2H),4.20-4.27(m,2H),4.32-4.37(m,2H),5.84(dd,1H),6.16(dd,1H),6.43(dd,1H),6.98-7.05(m,2H),7.30-7.37(m,2H),7.60-7.78(m,6H),8.13-8.20(m,2H)

< step 2 >

[ chemical formula 22]

A DMAc solution (3.3 mL) of the compound P1-2 (0.9 g) and the compound P14-A (0.1 g) was heated to an internal temperature of 80 ℃ under nitrogen. To this was added a DMAc solution (0.5 mL) of 2,2' -azobis (2-methylpropionic acid) dimethyl (0.054mmol, 0.012g) (trade name "V-601", manufactured by Wako Pure Chemical, lt d.), and the mixture was stirred at 80 ℃ for 2 hours. Then, by ¹ The disappearance of the polymerizable group was confirmed by H-NMR spectroscopy, and the reaction mixture was cooled to room temperature. Methanol was added thereto, filtration was performed, and the residue was washed with methanol to obtain 0.96g of compound (P14) as a white solid. When the obtained polymeric liquid crystalline substance P14 was analyzed by Gel Permeation Chromatography (GPC), the weight average molecular weight (Mw) was 14000 (in terms of polystyrene).

Hereinafter, logP in which the main chain is bound to the spacer group is shown in combination with the structures of the polymeric liquid crystal compounds P1 to P14 ₁ Value and log P of mesogenic group ₂ The difference in value.

[ chemical formula 23]

[ chemical formula 24]

[ dichroic substance ]

Dichroic materials D1 to D4 shown below were prepared.

[ chemical formula 25]

In the above formula, "Me" means methyl.

[ example 1]

[ production of an alignment film ]

A Glass substrate (soda-lime Glass, size 300mm × 300mm, thickness 1.1mm, manufactured by ltd.) was washed with an alkaline detergent, and then, after injecting pure water, the Glass substrate was dried.

The following composition 1 for forming an alignment film was applied to the dried glass substrate using a rod #12, and the applied composition 1 for forming an alignment film was dried at 110 ℃ for 2 minutes to form a coating film on the glass substrate.

The obtained coating film was rubbed 1 time (rotation speed of the roller: 1000 revolutions/interval thickness 2.9mm, table speed 1.8 m/min) to prepare an alignment film on a glass substrate.

[ chemical formula 26]

[ production of light-absorbing anisotropic film ]

The following liquid crystal composition 1 was spin-coated on the obtained alignment film 1 at 1000 revolutions per minute to form a coating film.

After the coated film was dried at room temperature for 30 seconds, it was further heated at 180 ℃ for 15 seconds.

Then, after cooling the coating film to room temperatureAt 80 deg.C, using a high-pressure mercury lamp with illuminance of 28mW/cm ² The alignment film 1 was irradiated under the irradiation conditions of (1) for 60 seconds, thereby forming a light absorption anisotropic film 1 on the alignment film 1.

[ chemical formula 27]

Examples 2 to 19 and comparative examples 1 to 4

An absorption anisotropic film was produced on the alignment film 1 in the same manner as in example 1, except that the kinds or contents of the polymeric liquid crystal compound, the dichroic material, the polymerization initiator, the surface modifier, and the solvent in the liquid crystal composition were changed as shown in table 1 below.

Two kinds of dichroic materials were used for the liquid crystalline compositions used for producing the light absorption anisotropic films of examples 15 to 19 and comparative examples 3 to 4.

In table 1 below, the surface improver F2 is as follows.

[ chemical formula 28]

[ evaluation ]

[ degree of orientation ]

The light absorbing anisotropic films of examples and comparative examples were mounted on a sample stage in a state where a wired polarizer was inserted into the light source side of an optical microscope (manufactured by NIKON CORPORATION, product name "ECLIPSE E600 POL"), the absorbance of the light absorbing anisotropic films in the wavelength region described in table 1 was measured using a multichannel spectrometer (Ocean Optics, inc., product name "QE 65000"), and the degree of orientation was calculated by the following formula.

Degree of orientation: s = [ (Az 0/Ay 0) -1]/[ (Az 0/Ay 0) +2]

Az0: absorbance of the light absorption anisotropic film with respect to polarized light in the absorption axis direction

Ay0: absorbance of polarized light in the direction of the polarizing axis of the light-absorbing anisotropic film

[ Table 1]

As shown in Table 1, it is shown that logP, if used, comprises backbone to spacer groups ₁ Value and log P of mesogenic groups ₂ In the case of the liquid crystalline composition having a repeating unit with a difference of 4 or more, a light absorption anisotropic film having a high degree of alignment can be obtained (example).

In contrast thereto it is shown that logP, if used, does not comprise a backbone to spacer group ₁ Value and log P of mesogenic groups ₂ The difference in the value is 4 or more, and the degree of alignment of the obtained light absorption anisotropic film is poor (comparative example).

[ Synthesis of Polymer liquid Crystal Compounds P9-1 to P9-6 ]

Except that the amount of 2,2' -azobis (2-methylpropionic acid) dimethyl was changed in "step 3" of the synthesis of the polymer liquid crystal compound P9, polymer liquid crystal compounds P9-1 to P9-6 having different weight average molecular weights (Mw) were obtained in the same manner as in the synthesis of the polymer liquid crystal compound P9. The weight average molecular weights (Mw) of the liquid crystal polymer compound P9 and the liquid crystal polymer compounds P9-1 to P9-6 are shown below.

P9：Mw＝17000

P9-1：Mw＝234000

P9-2：Mw＝38300

P9-3：Mw＝23200

P9-4：Mw＝10900

P9-5：Mw＝9500

P9-6：Mw＝6100

[ example 20]

The following liquid crystal composition 20 was spin-coated on the alignment film 1 used in example 1 at 1000 revolutions per minute to form a coating film 20.

[ crack evaluation ]

The obtained coating film 20 was visually observed, and cracks were evaluated according to the following criteria. The results are shown in table 2 below.

A: no cracks were found at all.

B: some fine cracks were found.

C: more coarse cracks were found.

After the coating film 20 was dried at room temperature for 30 seconds, it was further heated at 150 ℃ for 100 seconds. Subsequently, after the coating film 20 was cooled to room temperature, it was heated at 80 ℃ for 1 minute and cooled again to room temperature under an illuminance of 28mW/cm at room temperature using a high-pressure mercury lamp ² Is irradiated for 50 seconds, thereby forming the light absorption anisotropic film 20.

The degree of orientation of each wavelength region described in the following table 2 was evaluated in the same manner as in example 1. The results are shown in table 2 below.

[ examples 21 to 26]

A light absorption anisotropic film was obtained after forming a coating film on the alignment film 1 in the same manner as in example 20, except that the kind of the polymer liquid crystal compound in the liquid crystal composition was changed as shown in table 2 below. The evaluation of cracks in the coating film and the evaluation of the degree of orientation of the light absorption anisotropic film were performed in the same manner as in example 20. The results are shown in table 2 below.

[ Table 2]

[ example 27]

[ production of alignment film 27]

The above-mentioned composition 1 for forming an alignment film was coated on a transparent film (cellulose acylate film, FUJITAC TG40UL, fujifilm Corporation) having a surface subjected to saponification treatment using a #17 bar, and dried at 110 ℃ for 2 minutes to form a coated film.

The obtained coating film was subjected to rubbing treatment 1 time (rotation speed of the roller: 1000 revolutions/interval thickness 1.9mm, table speed 1.8 m/min), to prepare an alignment film 27 on the transparent film.

[ production of light-absorbing anisotropic film 27]

On the obtained alignment film 27, a coating film 27 was formed by coating the following liquid crystal composition 27 using a #15 bar, and the crack was evaluated in the same manner as in example 20. The evaluation results are shown in table 3 below.

The coating film 27 was heated at 150 ℃ for 100 seconds. Subsequently, after the coating film 27 was cooled to room temperature, it was heated at 80 ℃ for 1 minute and cooled again to room temperature under an illuminance of 28mW/cm at room temperature using a high-pressure mercury lamp ² Is irradiated for 50 seconds, thereby forming the light absorption anisotropic film 27. The degree of orientation of each wavelength region of the light absorption anisotropic film 27 was evaluated in the same manner as in example 20. The results are shown in table 3 below.

[ examples 28 to 29]

A light-absorbing anisotropic film was obtained after forming a coating film on the alignment film 27 in the same manner as in example 27, except that the kind of the polymer liquid crystal compound in the liquid crystal composition was changed as shown in table 3 below. The evaluation of the crack of the coating film and the evaluation of the degree of orientation of the light absorption anisotropic film were performed in the same manner as in example 27. The results are shown in table 3 below.

[ Table 3]

As shown in table 2 and table 3, it was found that when the liquid crystalline polymer compound having a weight average molecular weight of 10000 or more (examples 20 to 24 and examples 27 to 28) was used, the light absorption anisotropic film having less cracks was obtained. As shown in tables 2 and 3, it was found that when the polymeric liquid crystal compounds having a weight average molecular weight of less than 10000 (examples 25 to 26 and example 29) were used, light-absorbing anisotropic films having a high degree of alignment could be obtained.

[ Synthesis of Polymer liquid Crystal Compound (P1-A) ]

As shown below, a polymeric liquid crystal compound (P1-A) as a star polymer was synthesized. In the following formula (P1-A), "S" atom is directly bonded to the main chain of "PL".

[ chemical formula 29]

A DMAc solution (2.9 mL) of 1.00g of compound (P1-2) and 57mg of compound (P-A) was heated to 80 ℃ under nitrogen. 9.1mg2,2' -azobis (2-methacrylic acid) dimethyl was added thereto and heated at 80 ℃ for 2 hours. Then, by ¹ The disappearance of the polymerizable group was confirmed by H-NMR spectroscopy, and the reaction mixture was cooled to room temperature. Methanol (300 mL) was added thereto, and the residue was filtered and washed with methanol to obtain 0.96g of a polymer liquid crystal compound (P1-A) as a white solid.

The weight average molecular weight (Mw) of the resulting polymeric liquid crystal compound (P1-A) was 11300.

[ Synthesis of polymeric liquid Crystal Compound (P1-B) ]

A polymeric liquid crystal compound (P1-B) as a star polymer was synthesized as follows. In the formula (P1-B), the "S" atom is directly bonded to the main chain of the "PL".

[ chemical formula 30]

A DMAc solution (2.9 mL) of 1.00g of Compound (P1-2) and 92mg of Compound (P-B) was heated to 80 ℃ under nitrogen. 9.1mg2,2' -azobis (2-methacrylic acid) dimethyl was added thereto and heated at 80 ℃ for 2 hours. Then, by ¹ H-NMR spectroscopic measurement confirmed the disappearance of the polymerizable group, and the reaction mixture was cooled to room temperature. 300mL of methanol was added thereto, and the residue was filtered and washed with methanol to obtain 0.96g of a polymer liquid crystal compound (P1-B) as a white solid.

The weight-average molecular weight (Mw) of the resulting polymeric liquid crystal compound (P1-B) was 11800.

[ evaluation of solubility ]

The polymer liquid crystal compound (P1), polymer liquid crystal compound (P1-a), or polymer liquid crystal compound (P1-B)) was added to a solvent shown in table 4 below so as to have a predetermined concentration, and the solubility of the polymer liquid crystal compound was evaluated according to the following evaluation criteria. The results are shown in table 4 below.

AA: the resulting solution was dissolved at 45 ℃ for 10 minutes with stirring to become transparent. It was still transparent after standing at room temperature for 6 days.

A: the solution was dissolved by stirring at 45 ℃ for 10 minutes to become transparent. The transparent film remained transparent after standing at room temperature for 2 days, but became cloudy after standing at room temperature for 6 days.

B: the resulting solution was dissolved at 45 ℃ for 10 minutes with stirring to become transparent. The transparent film remained transparent after standing at room temperature for 1 day, but became cloudy after standing at room temperature for 2 days.

C: the resulting solution was dissolved at 45 ℃ for 10 minutes with stirring to become transparent. The transparent film remained transparent after standing at room temperature for 60 minutes, but became cloudy after standing at room temperature for 1 day.

D: the resulting solution was dissolved at 45 ℃ for 10 minutes with stirring to become transparent. The transparent film remained transparent after 5 minutes at room temperature, but became white and turbid after 60 minutes at room temperature.

E: the resulting solution was dissolved at 45 ℃ for 10 minutes with stirring to become transparent. The film remained transparent after standing at room temperature for 1 minute, but became white turbid after 5 minutes at room temperature.

F: it did not dissolve at 45 ℃ for 10 minutes under stirring.

[ Table 4]

[ example 30]

A light absorption anisotropic film was obtained in the same manner as in example 20, except that the following liquid crystalline composition 30 was used instead of the liquid crystalline composition 20. The degree of orientation of the light-absorbing anisotropic film was evaluated in the same manner as in example 20. The results are shown in table 5 below.

[ examples 31 to 32]

A light-absorbing anisotropic film was obtained in the same manner as in example 30, except that the kind of the polymeric liquid crystal compound in the liquid crystalline composition 30 was changed to the polymeric liquid crystal compound P1-A or P1-B as a star polymer. The degree of orientation of the light-absorbing anisotropic film was evaluated in the same manner as in example 30. The results are shown in table 5 below.

[ Table 5]

As shown in tables 4 and 5, it was found that the polymer liquid crystal compounds (P1-A and P1-B) as star polymers were excellent in solubility and were capable of forming light-absorbing anisotropic films having a high degree of alignment (examples 31 and 32).

[ example 33]

[ production of alignment film 33]

The above-mentioned composition 1 for forming an alignment film was coated on a transparent film (cellulose acylate film, FUJITAC TG40UL, fujifilm Corporation) having a surface subjected to saponification treatment with a #17 bar, and dried at 110 ℃ for 2 minutes to form a coated film.

Subsequently, 41.6 parts by mass of butoxyethanol, 41.6 parts by mass of dipropylene glycol monomethyl group, and 15.8 parts by mass of pure water were added to 1 part by mass of the photo-alignment material E-1 having the above-described structure, and the obtained solution was subjected to pressure filtration using a 0.45 μm membrane filter to prepare a coating liquid 33 for a photo-alignment film. The obtained coating liquid 33 for a photo-alignment film was coated on the above-described coating film and dried at 60 ℃ for 1 minute. The resultant coating film was irradiated with linearly polarized ultraviolet light (illuminance: 4.5mW, dose: 500 mJ/cm) using a polarized ultraviolet exposure apparatus ² ) Thereby preparing an alignment film 33.

[ chemical formula 31]

[ production of polarizing element 33]

On the obtained alignment film 33, a coating film was formed by coating the following liquid crystalline composition 33 with a #15 bar, and the coating film was heated at 140 ℃ for 90 seconds. Subsequently, after the coated film 33 was cooled to room temperature, it was heated at 80 ℃ for 1 minute and cooled again to room temperature under an illuminance of 28mW/cm at room temperature using a high-pressure mercury lamp ² The light absorption anisotropic film 33 was formed by irradiating for 60 seconds under the irradiation conditions of (1).

Next, on the light absorption anisotropic film 33, the following composition 33 for forming a barrier layer was continuously applied using a #30 wire bar, and dried at 60 ℃ for 5 minutes, thereby obtaining a polarizing element 33 in which the barrier layer 33 was formed on the light absorption anisotropic film 33.

[ chemical formula 32]

[ production of a lambda/4 retardation film 1]

< preparation of liquid Crystal Aligning agent >

A coating liquid for an optically anisotropic layer having the following composition was prepared. After adding the coating liquid for an optically anisotropic layer to butyl acetate and stirring, the mixture was filtered through a filter having a pore size of 1 μm, thereby preparing a liquid crystal aligning agent having a solid content of 7.5 wt%. In the liquid crystal aligning agent obtained, the polymer A-1 and other components are sufficiently dissolved in the solvent in the amounts added.

Further, the groups adjacent to the acryloyloxy groups of the liquid crystalline compounds L-3 and L-4 described below represent propylene (groups in which methyl groups are substituted with ethylene), and the liquid crystalline compounds L-3 and L-4 described below each represent a mixture of positional isomers in which the methyl groups are different in position.

[ chemical formula 33]

[ chemical formula 34]

< production of cellulose acylate film 1 >

(preparation of concentrated cellulose acylate solution for core layer)

The following composition was put into a stirring tank and stirred to dissolve each component, thereby preparing a cellulose acetate solution used as a concentrated cellulose acylate solution for the core layer.

[ chemical formula 35]

(preparation of concentrated cellulose acylate solution for outer layer)

To 90 parts by mass of the above-mentioned core layer cellulose acylate dope was added 10 parts by mass of the following matting agent solution, thereby preparing a cellulose acetate solution used as an outer layer cellulose acylate dope.

(production of cellulose acylate film 1)

After the core layer cellulose acylate dope and the outer layer cellulose acylate dope were filtered with a filter paper having an average pore size of 34 μm and a sintered metal filter having an average pore size of 10 μm, 3 layers of the core layer cellulose acylate dope and the outer layer cellulose acylate dopes on both sides thereof were simultaneously cast from a casting port onto a roll at 20 ℃ (a belt casting machine). Peeling was performed in a state where the solvent content was approximately 20 mass%, and both ends of the film in the width direction were fixed with tenter clips, and drying was performed while stretching at an elongation of 1.1 times in the transverse direction. Then, the resultant was conveyed between the rolls of the heat treatment apparatus and further dried to obtain a cellulose acylate film 1 having a thickness of 40 μm. The in-plane retardation of the resulting cellulose acylate film 1 was 0nm.

< production of λ/4 retardation film 1 >

On one surface of the produced cellulose acylate film 1, an alignment film 33 was formed using the alignment film-forming composition 1 and the coating liquid 33 for a photo-alignment film in the same manner as in the production of the alignment film 33. Next, a composition layer was formed on the alignment film 33 by applying a liquid crystal alignment agent prepared in advance by a bar coater. The resulting composition layer was heated to 110 ℃ with a hot plate and then cooled to 60 ℃ to stabilize the orientation. Then, the mixture was maintained at 60 ℃ and irradiated with ultraviolet rays (500 mJ/cm) under a nitrogen atmosphere (oxygen concentration 100 ppm) ² And an ultra-high pressure mercury lamp) were aligned and fixed to form an optically anisotropic layer having a thickness of 2.3 μm, thereby producing a λ/4 retardation film 1. The retardation of the obtained λ/4 retardation film 1 was 140nm.

[ preparation of Positive C plate film 2]

As the dummy support, a commercially available triacetyl cellulose film "Z-TAC" (manufactured by Fujifilm Corporation) (which was used as the cellulose acylate film 2) was used. After passing the cellulose acylate film 2 through a dielectric heating roller having a temperature of 60 ℃ and raising the surface temperature of the film to 40 ℃, the film was coated with a bar coater in an amount of 14mL/m ² An alkali solution having the following composition was applied to one surface of the film, heated to 110 ℃, and carried for 10 seconds under a Noritake co. Next, pure water was similarly applied to the coating film at a rate of 3mL/m using a bar coater ² . Next, water washing by a fountain coater and dehydration by an air knife were repeated 3 times, and then the cellulose acylate film was carried for 10 seconds in a drying zone at 70 ℃ and dried, thereby producing an alkali saponification-treated cellulose acylate film 2.

The cellulose acylate film 2 subjected to the alkali saponification treatment was used, and an alignment film-forming coating liquid having the following composition was continuously applied thereto using a #8 wire bar. The film was dried at 60 ℃ for 60 seconds and at 100 ℃ for 120 seconds to form an alignment film.

The following coating liquid N for an optically anisotropic film was applied on the cellulose acylate film 2 having an alignment film prepared in the above, and after aging at 60 ℃ for 60 seconds, 70mW/cm was used under air ² Irradiating 1000mJ/cm with an air-cooled metal halide lamp (EYE GRAPHICS Co., ltd., manufactured by Ltd.) ² And the alignment state is fixed, thereby vertically aligning the polymerizable rod-like liquid crystal compound to produce the positive C-plate film 2. Rth is-60 nm at the wavelength of 550 nm.

[ chemical formula 36]

In formula (B03), a: B =90 (mass ratio).

[ preparation of circularly polarizing plate ]

The positive C plate film 2 produced in the above was transferred via an adhesive on the optically anisotropic layer side of the λ/4 retardation film 1, and the cellulose acylate film 2 was removed. Next, the cellulose acylate film 1 side of the λ/4 retardation film 1 was bonded to the barrier layer 33 side of the polarizing element 33 via an adhesive to obtain a circularly polarizing plate 33.

The degree of orientation of each wavelength region of the circularly polarizing plate 33 was evaluated in the same manner as in example 20. The results are shown in table 6 below.

[ examples 34 to 35]

Polarizing elements 34 to 35 and circularly polarizing plates 34 to 35 were produced in the same manner as in example 33, except that the kind of the polymer liquid crystal compound in the liquid crystal composition was changed as shown in table 6 below. The degree of orientation of the circularly polarizing plate was evaluated in the same manner as in example 33. The results are shown in table 6 below.

[ example 36]

[ production of alignment film 36]

A solution obtained by adding 0.33 part by mass of Denacol Acrylate DA-212 manufactured by Nagase ChemteX Corporation, 41.6 parts by mass of butoxyethanol, 41.6 parts by mass of dipropylene glycol monomethyl, and 15.8 parts by mass of pure water to 0.67 part by mass of the above-mentioned photo-alignment material E-1 was filtered under pressure through a 0.45 μm film filter to prepare a coating solution 36 for a photo-alignment film. The coating liquid 36 for a photoalignment film obtained was applied to a coating film of the above-described composition 1 for forming an orientation film on TG40UL subjected to saponification treatment used for the orientation film 33, and dried at 60 ℃ for 1 minute. The resulting coating film was irradiated with linearly polarized ultraviolet light (illuminance 4.5mW, dose 500 mJ/cm) ² ) Thereby, an alignment film 36 was produced.

A polarizing element 36 and a circularly polarizing plate 36 were formed in the same manner as in example 33, except that the alignment film 36 was used and the type of the polymer liquid crystal compound in the liquid crystal composition was changed as shown in table 6 below. The degree of orientation of the circularly polarizing plate 36 was evaluated in the same manner as in example 33. The results are shown in table 6 below.

[ example 37]

[ production of alignment film 37]

< Synthesis of Polymer C-2 >

100.0 parts by mass of 2- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, 500 parts by mass of methylisobutylketone, and 10.0 parts by mass of triethylamine were charged into a reaction vessel equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser, and the mixture was stirred at room temperature. Next, after 100 parts by mass of deionized water was added dropwise to the resulting mixture over 30 minutes through a dropping funnel, the mixture was reacted at 80 ℃ for 6 hours while being mixed under reflux. After the reaction was completed, the organic phase was taken out, and washed with a 0.2 mass% ammonium nitrate aqueous solution until the washed water was neutral. Then, the solvent and water were distilled off from the obtained organic phase under reduced pressure, whereby an epoxy group-containing polyorganosiloxane was obtained as a viscous transparent liquid.

With respect to the polyorganosiloxane having an epoxy group, the process is carried out ¹ As a result of H-NMR (Nuclear Magnetic resonance) analysis, it was confirmed that a peak based on an oxirane group was obtained at a chemical shift (. Delta.) =3.2ppm or so, and that no side reaction of an epoxy group occurred during the reaction. The polyorganosiloxane having an epoxy group had a weight average molecular weight Mw of 2,200 and an epoxy equivalent of 186 g/mole.

Then, 10.1 parts by mass of the obtained polyorganosiloxane having an epoxy group, 0.5 parts by mass of an acrylic-containing carboxylic acid (TOAGOSEI co., ltd., trade name, "aroneix M-5300", omega-carboxy-polycaprolactone acrylate (polymerization degree n ≈ 2)), 20 parts by mass of butyl acetate, 1.5 parts by mass of the cinnamic acid derivative obtained by the method of synthesis example 1 of jp 2015-026050, and 0.3 parts by mass of tetrabutylammonium bromide were charged into a 100mL three-necked flask, and the obtained mixture was stirred at 90 ℃ for 12 hours. After stirring, the mixture was diluted with butyl acetate in an amount equivalent (mass) to the obtained mixture, and the diluted mixture was further washed 3 times. The resulting mixture was concentrated and the dilution with butyl acetate was repeated twice, to finally obtain a polyorganosiloxane containing a photo-alignment group (see below)A solution of the above-mentioned polymer C-2). The weight average molecular weight Mw of this polymer C-2 was 9,000. And also, ¹ as a result of H-NMR analysis, the content of the cinnamate group-containing component in the polymer C-2 was 23.7% by mass.

[ chemical formula 37]

< preparation of composition for Forming alignment layer 37 >

The following components were mixed to prepare an alignment layer forming composition 37.

[ chemical formula 38]

Additive (B-1): san-Apro Ltd, manufactured by TA-60B (refer to the following structural formula)

[ chemical formula 39]

The composition 37 for forming an alignment layer was applied by spin coating on the coating film of the composition 1 for forming an alignment layer provided on the TG40UL subjected to saponification treatment used for the alignment film 33, and the support on which the composition 37 for forming an alignment layer was applied was dried on a hot plate at 80 ℃ for 5 minutes to remove the solvent, thereby forming a coating film.

The obtained coating film was irradiated with polarized ultraviolet rays (25 mJ/cm) ² Super high pressure mercury lampThus, an alignment film 37 was produced.

A polarizing element 37 and a circularly polarizing plate 37 were formed in the same manner as in example 34, except that an alignment film 37 was used. The degree of orientation of the circularly polarizing plate 37 was evaluated in the same manner as in example 33. The results are shown in table 6 below.

[ example 38]

[ production of alignment film 38]

The following composition 38 for forming an alignment film was coated on glass using a #15 rod, and after drying the coated composition 38 for forming an alignment film at 80 ℃ for 15 minutes, a coating film was formed on glass by heating at 250 ℃ for 1 hour.

The resulting coating film was subjected to polarized ultraviolet irradiation 1 time (1J/cm) ² Ultra-high pressure mercury lamp) to prepare an alignment film 38 on the glass substrate.

A polarizing element 38 and a circularly polarizing plate 38 were formed in the same manner as in example 34, except that the alignment film 38 was used. The degree of orientation of the circularly polarizing plate 38 was evaluated in the same manner as in example 33. The results are shown in table 6 below.

[ example 39]

A polarizing element 39 and a circularly polarizing plate 39 were produced in the same manner as in example 33, except that the kind of the polymer liquid crystal compound in the liquid crystal composition was changed as shown in table 6 below. The degree of orientation of the circularly polarizing plate 39 was evaluated in the same manner as in example 33. The results are shown in table 6 below.

[ example 40]

On the anisotropic light absorption film of example 39, the following composition 40 for forming a blocking layer was continuously applied using a wire bar of #17 and dried at 60 ℃ for 5 minutes, thereby producing a polarizing element 40 in which a blocking layer was formed on the anisotropic light absorption film. A circularly polarizing plate 40 was formed in the same manner as in example 39 except that the polarizing element 40 was used. The degree of orientation of the circularly polarizing plate 40 was evaluated in the same manner as in example 33. The results are shown in table 6 below.

[ examples 41 to 42]

Polarizing devices 41 to 42 and circularly polarizing plates 41 to 42 were produced in the same manner as in example 33, except that the amount (parts by mass) of the dichroic material in the liquid crystal composition was changed as shown in table 6 below. The degree of orientation of each circularly polarizing plate was evaluated in the same manner as in example 33. The results are shown in table 6 below.

[ Table 6]

As shown in Table 6, it is shown that logP, if used, comprises backbone to spacer groups ₁ Value and log P of mesogenic group ₂ In the case of a liquid crystalline composition having a repeating unit with a difference of 4 or more, a light absorption anisotropic film (polarizer) having a high degree of alignment can be obtained (example).

[ example 43]

[ production of polarizing element 43]

On the alignment film 33 of example 33, a coating film was formed by coating the following liquid crystalline composition 43 using a #4 bar, and the coating film was heated at 140 ℃ for 90 seconds. Subsequently, after the coating film was cooled to room temperature, it was heated at 80 ℃ for 1 minute and cooled again to room temperature under an illuminance of 28mW/cm using a high-pressure mercury lamp at room temperature ² Is irradiated for 60 seconds, thereby forming the light absorption anisotropic film 43. Except for this, the polarizing element 43 and the circularly polarizing plate 43 were fabricated in the same manner as in example 33.

The degree of orientation of the circularly polarizing plate 43 in each wavelength region was evaluated in the same manner as in example 20. The results are shown in table 7 below.

Examples 44 to 46

Polarizing elements 44 to 46 and circularly polarizing plates 44 to 46 were produced in the same manner as in example 43, except that the composition used for producing the light absorption anisotropic film was changed to the composition shown in table 7 below.

The degree of orientation of each of the circularly polarizing plates 44 to 46 in each wavelength region was evaluated in the same manner as in example 20. The results are shown in table 7 below.

[ Table 7]

As shown in Table 7, it is shown that logP, if used, comprises a backbone to a spacer group ₁ Value and log P of mesogenic groups ₂ When the difference in value is 4 or more, a light-absorbing anisotropic film (polarizing element) having a high degree of alignment can be obtained from the liquid crystalline composition having a repeating unit (example).

Claims

1. A liquid crystal composition comprising a polymeric liquid crystal compound containing a repeating unit represented by the following formula (1) and a dichroic substance,

in the following formula (1), the difference between the logP value of P1, L1 and SP1 and the logP value of M1 is 4.5 or more, the logP value of P1, L1 and SP1 is 0 or less, the logP value of M1 is in the range of 4 to 6,

in the formula (1), P1 represents a main chain of a repeating unit, L1 represents a single bond or a 2-valent linking group, SP1 represents a spacer group, M1 represents a mesogenic group, T1 represents a terminal group,

m1 is represented by the following formula (M1-A) or the following formula (M1-B),

in the formula (M1-A), A1 is a 2-valent group selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group and an alicyclic group; a1 represents an integer of 1 to 10; when A1 is 2 or more, a plurality of A1 s may be the same or different; * Indicates a bonding position to SP1 or T1,

in the formula (M1-B), A2 and A3 are each independently A2-valent group selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group and an alicyclic group; a2 represents an integer of 1 to 10; when A2 is 2 or more, a plurality of A2 may be the same or different, and a plurality of LA1 may be the same or different; when a2 is 1, LA1 is a 2-valent linking group; when a2 is 2 or more, a plurality of LA1 s are each independently a single bond or a 2-valent linking group, and at least one of a plurality of LA1 s is a 2-valent linking group; * Indicates the bonding position to SP1 or T1.

2. The liquid crystalline composition according to claim 1,

the SP1 in the formula (1) contains at least one structure selected from the group consisting of an oxyethylene structure and an oxypropylene structure.

3. The liquid crystalline composition according to claim 1 or 2,

in the following formula (2), the difference between the logP values of P2, L2 and SP2 and the logP value of M2 is less than 4,

in the formula (2), P2 represents a main chain of a repeating unit, L2 represents a single bond or a 2-valent linking group, SP2 represents a spacer group, M2 represents a mesogenic group, T2 represents a terminal group, and M2 has the same meaning as M1 in the formula (1).

4. The liquid crystalline composition according to claim 1 or 2,

the polymeric liquid crystal compound further comprises a repeating unit represented by the following formula (3),

in the formula (3), P3 represents a main chain of a repeating unit, L3 represents a single bond or a 2-valent linking group, SP3 represents a spacer group, and T3 represents a terminal group.

5. The liquid crystalline composition according to claim 1 or 2,

the polymeric liquid crystal compound contains two or more kinds of repeating units represented by the formula (1).

6. The liquid crystalline composition according to claim 1 or 2,

the weight average molecular weight of the macromolecular liquid crystal compound is more than 10000.

7. The liquid crystalline composition according to claim 1 or 2,

8. The liquid crystalline composition according to claim 1 or 2,

the polymeric liquid crystal compound is a star polymer represented by the following formula (4);

in the formula (4), n _A Represents an integer of 3 or more, each of the plurality of PIs independently represents a polymer chain containing any one of the repeating units represented by the formulae (1) to (3), and a represents an atomic group that becomes a core of the star polymer; wherein at least one of the plurality of PIs represents a polymer chain including a repeating unit represented by the formula (1).

9. A polymeric liquid crystal compound comprising a repeating unit represented by the following formula (1),

in the following formula (1), the difference between the logP values of P1, L1 and SP1 and the logP value of M1 is 4.5 or more, the logP values of P1, L1 and SP1 are 0 or less, the logP value of M1 is in the range of 4 to 6,

in the formula (M1-A), A1 is a 2-valent group selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group and an alicyclic group; a1 represents an integer of 1 to 10; when A1 is 2 or more, a plurality of A1 s may be the same or different; * Indicates a bonding position with SP1 or T1,

10. The polymeric liquid crystalline substance according to claim 9,

SP1 in the formula (1) contains at least one structure selected from the group consisting of an oxyethylene structure and an oxypropylene structure.

11. The polymeric liquid crystal compound according to claim 9 or 10,

12. The polymeric liquid crystal compound according to claim 9 or 10,

13. The polymeric liquid crystal compound according to claim 9 or 10,

14. The polymeric liquid crystal compound according to claim 9 or 10,

15. The polymeric liquid crystal compound according to claim 9 or 10,

16. The polymeric liquid crystal compound according to claim 9 or 10,

the polymeric liquid crystal compound is a star polymer represented by the following formula (4),

17. A light absorption anisotropic film formed using the liquid crystalline composition according to any one of claims 1 to 8.

18. A laminate having a substrate and the light absorbing anisotropic film of claim 17 disposed on the substrate.

19. The laminate according to claim 18, further comprising a λ/4 plate provided on the light absorption anisotropic film.

20. An image display device comprising the light-absorbing anisotropic film according to claim 17 or the laminate according to claim 18 or claim 19.